Greetings Phan,
the lucid dreams range of vibes are excellent.
that one as you said has the vibration at the tip and is curved so it designed to stimulate the g spot. yes it is waterproof , meaning it can go in the shower spar and so on. it is better for cleaning reasons to have a water proof one .. just make sure that you have the cap on tight..
many customers come in and say its not working, but that is becasue they have not sealled it right.
I work in the adult sex toy industry and the feed back that i have gotten about this toy is that it excellent .
I know we sell at lot of them so they must speak for them selfs.