I sampled Garren for a year. So I had both for awhile.
I subscribe as stated before to BTM because of the size of my basket. 8-10 stocks. One as Dew points out can't keep up with more than 2-4.
But I like the biotech risk spread over more stocks. So I use a service to keep me informed of things I may miss, to cover some scientific technical aspects, etc.
It's relatively cheap when you look at return & safety provided.
BTW I due my own DD for the first purchase of any company recommendations be damned.