I think I want to purchase one of these but I’m not sure which one to go with. Any suggestions? Thanks.
They do different things so it all depends on what you want them to do.
Here is a quick sampling of a few that are currently available:
MX200: Asian Persuasion
MX203: Caucasian Persuasian
MX272: Mood uplift, cooperation
Once again they are test mixes, results vary and even if they work GREAT for you there is no guarantee they will continue to be available down the line as was seen with MX292.
You know what, I just ordered some MX292 since it’s in stock.
Well there are a lot of posts on that one … good luck.
I love how they just sneak these stock into place and see who notices in time… Won’t be me, since i got plenty last go around. Gotta share the love with the others. 
we can’t tell you what test mixes do. you tell us. That’s the whole point.
Otherwise they’d be Products.
It’s like you’re beta testing software. Some of these may work for some people, others may have horrible luck and notice nothing.
give it a try. it’s fun. (: