Oh I know battery life will be poo. But I already have 2 18350s gathering dust. And I never used my istick mini 'cause 10w didn't quite cut it, even for "drive to the post office" duty. But I can chuck plenty of tootles with 25.
That's about what I paid for my Vamo v2, which only goes to 15w, so I'd say it's a good deal. If you can stand the battery life -- I couldn't, in mine at 10w, and found the 18650s make it too dang long, so I got a Chi You Kick Ring to enable it to use 18500s.
Andria