I'm hearing from friends who had Maitreya bodies that they're switching over to Tonic, in light of what increasingly appears to be an exodus from SL of Maitreya's creator.
Be sure to let your friends know that many items made for Maitreya fit Tonic bodies pretty well in many cases. I have Tonic Fine - M pants, jackets, some boots (closed foot), and skirts fit pretty well. The Tonic body can also wear M hands, which means a collection of jewelry rigged to M hands won't go to waste. And of course, the feet fit Slink shoes.