I recently received the whole set of the Zig 2-way Glue.
I so far used the two bigger ones, I find them realy usefull, I especially like the fact that I can cover a large area with no fuss.
The 2-way stand for their versatility of use, since they can be used for permanent adhesion while they're wet, and for temporary adhesion if left to dry.
I think that they're going to eliminate all other glues and adhesives from my stash (except from the pop ones!).