Have you checked out the reviews? There are 18 of them. You can find them here: link
I checked out one of the reviews and this is what I found that should answer your question:
"I did run it for 1.5 hours in a series of 30 and 15 minute sessions at varying power levels without charging. It did not lose power over that time, so I expect it will live up to promises of two hours. Thanks to the convenient charging/storage case, this long lasting power is just an added benefit rather than an essential feature---but it's good to know, nevertheless, that the We-Vibe 3 won't quit when you need it most."
That quote was taken from AntiPova's review which you can view here: link
So WORTH every dime! We have never had it run dead during a use and it recharges right after you put it back in the case with the remote! Will become a favorite or very very close!. Not too mention it can be used with other toys or while having intercourse as well
The more expensive toys aren't really more expensive in the long run. They don't need batteries, because most are rechargeable, and they don't need to be replaced after a few months. Good quality toys last for years, or even a lifetime depending on the toy.