is it worth it? yes, yes it is; and if you smoke a lot, you'll help your lungs a lot
I agree. My lungs couldn't take smoke anymore but vapor goes down easy. The effect is a little different since some of the toxins you get with combustion are missing from vapor. It doesn't affect the body as much as far as couchlock goes, since the toxins are mostly sleep inducing.

If you like bongs and are interested in a vape, I would highly recommend one of the 7th Floor vapes-Silver Surfer or Da Buddha. The DB is $159 less 10% (discount good for both) with coupon code '420Times'. I've got the Surfer and the hits are BIG for a vape. I also have the Vapolution that onequickmove mentioned. It's great for a home/portable unit, but the SSV/DB provides the big hits that bong users like. You can't hit it like a bong. Herb vaporizes slower than it burns, and a real heavy hit pulls a lot of cold air through the bowl, and you can lower the temp too much if you're not careful. But vapor is sooooo smooth-take a nice, slow, deep hit and you end up with enough vapor for 3 people.

If you decide to buy a vape, I wouldn't get one of the cheap <$100 boxes. They're cheaply made in China, with questionable parts, have no warranty, and just don't hold up. I wouldn't trust the safety of the guts anyway. The SSV/DB units have a nice clean vapor path that only travels through about an inch of the heater tube, outside all electrical components.

If smoke doesn't bother you at all, and you like the smoke effect, you may not want to completely give it up, but most people that try vapor like it enough to vape at least part of the time.