So, let me begin by recommending my coach: [personal information removed as requested] (username: [removed]). 
This guy is great! I've learned so much from him, in just three lessons. His prices are favorable. [name removed] is rated 2075 (FIDE, not Chess.com), and his deep understanding of the game is evident. He is also a very pleasant guy, and I really like his approach. Some coaches seems to advocate a somewhat conformist way of playing chess (or at least, that's how I perceive it, when I read their comments in the forums). [name removed] isn't like that, which is great for a player like me, who like to experiment, and play somewhat offbeat openings.
I highly recommend him!
Now, I'm looking forward to hear what you guys think about your coaches!
[Personal Information removed from post upon request - Moderator (Mike)]
A little more than a month ago I had my first lesson with a coach here on Chess.com. Yesterday, I had my third lesson, and - again - it was great! I though it would be good to have a forum topic, in which we can recommend coaches (and tell if we had a bad experience with a coach as well).
I hope you will all try to keep the comments in this topic serious, so it can be used as a reference for other players looking for a coach. Please do not post pictures, diagrams and jokes here. Thanks!