The cheap little plastic Bic ones that come 10 to a bag or something don't last long at all. I get maybe 3-4 uses out of each. But since I'm not in a relationship and I live in a cold-weather state, nobody sees parts I'd need to shave but a couple months a year, so that's fine.
Never tried the Venus, so can't help you there. Glad you found something you like, though!
Candy