Steve -

This type of antenna works, and can work VERY well.

But Reg left out a very important detail: You will need some
form of wide-range antenna tuner for multi-band operation.

Your rig may have a built-in tuner that will work over at least some
of the frequency range. Another option is to buy a desk-top tuner.
(Life will be simpler if you buy one that is sized to your present and
near-future power requirements.) Yet another option is to implement
a tuner in distributed form using switchable lengths of the same ladder
line you use in your feedline. (This will require some home-brewing
aptitude, and possibly a very tolerant XYL.) There is a strong advocate
of this approach that frequently posts here, and can tell you all about it.
Don't forget you will need to re-tune when you QSY, unless you have
implemented some form of auto-tuner.

For what it's worth, I dealt with a similar situation using W9INN multi-
band dipoles in an inverted vee configuration; and I'd do it again in a
heartbeat. Meanwhile, a friend of mine decided to try the classic vee+
ladder line+tuner approach, and he's been fighting it for a few months now.
He's on his second or third tuner, while I don't even need one. I think
he'd do it "my" way, if he was starting again.

73, Ed