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First of, I am a Monero core developer. I'll try to remain as factual and objective as possible, though.

Now, for the simple answer: use Monero

And for the longer answer: read Andrew Poelstra's very informative reply.

I would also add the following:

• Zero-Knowledge Proof has several of fundamental issues that may not even be fixable (from the less critical to the most critical): trusted accumulator, lack of academic research, obscuring the whole economy means that it is impossible to notice a bug until the economy had already been badly damaged. See our comparison on Monero ANN.
• The CryptoNote technology is sound, but most actual implementation of it are not -- Boolberry and particularly Monero being the only ones worth considering, on the grounds of market confidence, activity and volume.
• Monero also [works with the i2p initiative to obsfuscate IP](https://geti2p.net/en/blog/post/2014/08/15/The-privacy-solutions-project - old link) (the only thing left visible once CryptoNote is in action).

First of, I am a Monero core developer. I'll try to remain as factual and objective as possible, though.

Now, for the simple answer: use Monero

And for the longer answer: read Andrew Poelstra's very informative reply.

I would also add the following:

• Zero-Knowledge Proof has several of fundamental issues that may not even be fixable (from the less critical to the most critical): trusted accumulator, lack of academic research, obscuring the whole economy means that it is impossible to notice a bug until the economy had already been badly damaged. See our comparison on Monero ANN.
• The CryptoNote technology is sound, but most actual implementation of it are not -- Boolberry and particularly Monero being the only ones worth considering, on the grounds of market confidence, activity and volume.
• Monero also works with the i2p initiative to obsfuscate IP (the only thing left visible once CryptoNote is in action).

First of, I am a Monero core developer. I'll try to remain as factual and objective as possible, though.

Now, for the simple answer: use Monero

And for the longer answer: read Andrew Poelstra's very informative reply.

I would also add the following:

• Zero-Knowledge Proof has several of fundamental issues that may not even be fixable (from the less critical to the most critical): trusted accumulator, lack of academic research, obscuring the whole economy means that it is impossible to notice a bug until the economy had already been badly damaged. See our comparison on Monero ANN.
• The CryptoNote technology is sound, but most actual implementation of it are not -- Boolberry and particularly Monero being the only ones worth considering, on the grounds of market confidence, activity and volume.
• Monero also works with the i2p initiative to obsfuscate IP (the only thing left visible once CryptoNote is in action).

First of, I am a Monero core developer. I'll try to remain as factual and objective as possible, though.

Now, for the simple answer: use Monero

And for the longer answer: read Andrew Poelstra's very informative reply.

I would also add the following:

• Zero-Knowledge Proof has several of fundamental issues that may not even be fixable (from the less critical to the most critical): trusted accumulator, lack of academic research, obscuring the whole economy means that it is impossible to notice a bug until the economy had already been badly damaged. See our comparison on Monero ANN.
• The CryptoNote technology is sound, but most actual implementation of it are not -- Boolberry and particularly Monero being the only ones worth considering, on the grounds of market confidence, activity and volume.
• Monero also [works with the i2p initiative to obsfuscate IP](https://geti2p.net/en/blog/post/2014/08/15/The-privacy-solutions-project - old link) (the only thing left visible once CryptoNote is in action).

First of, I am a Monero core developper. I'll try to remain as factual and objective as possible, though.

Now, for the simple answer: use Monero

And for the longer answer: read Andrew Poelstra's very informative reply.

I would also add the following:

• Zero-Knowledge Proof has several of fundamental issues that may not even be fixable (from the less critical to the most critical): trusted accumulator, lack of academic research, obscuring the whole economy means that it is impossible to notice a bug until the economy had already been badly damaged. See our comparison on Monero ANN.
• The CryptoNote technology is sound, but most actual implementation of it are not -- Boolberry and particularly Monero being the only ones worth considering, on the grounds of market confidence, activity and volume.
• Monero also works with the i2p initiative to obsfuscate IP (the only thing left visible once CryptoNote is in action).

First of, I am a Monero core developer. I'll try to remain as factual and objective as possible, though.

Now, for the simple answer: use Monero

And for the longer answer: read Andrew Poelstra's very informative reply.

I would also add the following:

• Zero-Knowledge Proof has several of fundamental issues that may not even be fixable (from the less critical to the most critical): trusted accumulator, lack of academic research, obscuring the whole economy means that it is impossible to notice a bug until the economy had already been badly damaged. See our comparison on Monero ANN.
• The CryptoNote technology is sound, but most actual implementation of it are not -- Boolberry and particularly Monero being the only ones worth considering, on the grounds of market confidence, activity and volume.
• Monero also works with the i2p initiative to obsfuscate IP (the only thing left visible once CryptoNote is in action).