Up until about 2 months ago I would buy a half every 2-3 months and smoke one when I got home from my Mon-Wed-Fri weight sessions. I found that it helped with my recovery and the extra sleep didn't hurt.
The one thing that stinks is the short term memory loss and being a little cloudy in the morning, but the fish oil seems to clear that up
I am taking 2-3 months off at the moment to clear my head and so my tolerance isn't so high
No negative impact on cardio either, seems to be a pretty friendly "drug" in my opinion.