top quality products, and the taste of the BSL flavors is second only to muscle milk. Their customer service is some of the best ive ever dealt with. Different proteins mix differently. WPI dissolves pretty much instantly, while casein on the other hand tends to gum up no matter what.
yes you can mix whatever you want to make an MRP.
I dont use their pre mix formula, i generally only use WPI ion exchange, but their mixes are great.
If you order from them, the discount code in my sig will get you 5% off every order.