tell that to PADI who now have an option for computer only OW courses....
My point is, that both the mares puck and the zoop are irritating computers, and frankly a waste of money, when you can spend not much more in the grand scheme of things and get a much better computer.
Seeker, you're also not realizing the panic factor that many OW divers get when their computer dies, and/or they see mandatory decompression. With tables you can help to mitigate that.
Point still stands, computer should be one of the last things you buy if it is is going to be the difference between a computer and regs, or a computer and BC, those two should always come first.