Not really. They log, and there have been anecdotes about people losing anonymity because of it. You are much better off with PIA or another product with stronger anonymity guarantees.

Ultimately, you never know if the guarantee is worth anything until it's tested, but there have been cases where HMA was tested, and failed.

Just don't think they'll ignore US subpoenas.

really? I think you should read this: http://invisibler.com/lulzsec-and-hidemyass/

heh. it's pretty catchy. quite like the name