I look forward to throwing this shirt on every chance I get. I use it during long runs, after a solid upper body workout, and for those long days  8 hour shifts in clinic. It help me the most with recovery, but I''ve also found it useful for postural support during my runs and sitting in a chair during surgery. The profession I''m in is known to cause back and neck problems, and protecting those with good posture is key to long term success.
At first it was really really tight, almost unmanageable to get on, but after 2 uses and a wash it loosened up slightly. The quality of the fabrics is 10x better than under armor (I have one of their compression shirts). The fabrics actually do their job, and the muscle specific design is brilliant. After a solid chest day, or lat day, or arms day, and a night of wearing this shirt, I feel 95% recovered, whereas I usually would be bracing myself for DOMS (Delayed Onset Muscle Soreness Syndrome) at the 48 hour mark.

BOTTOM LINE: It works, multi-functional, well made, comfortable, true to size, love it!