I look forward to getting my Gainz box every month. I get a t-shirt, full size products and some samples every month. Customer service is great, I've never had an issue. What more can I say? I freaking love this box! Best bang for your buck in my opinion.
For 49.99/month I expect a lot out of a fitness box. The sports bra was nice, but it retails for $36, and the other items in the box were samples, not full sized. Customer service was responsive, but seemed unorganized. I had to ask for the tracking number, and ask again for the carrier.
In my opinion, there are other options that give you better bang for your buck.