I've just got a Tenga - mine is the double hole variety with one end simulating a vagina and the other end an anus. I'd never used a masturbation device before, and have to say it's really good! The instructions suggest two guys use it together, one in each end - now that would be fun!
I've been seeing a new lover, she is a fan of the hand job and has good control, she likes to tease it out before I can blow my load. Jacking off requires time, unless you need immediate relief.