Steve,

You might be disappointed. Basically what you end up with is a severely
shortened dipole that is inductively loaded. It has limited bandwidth and
offers no gain. As an advantage, however, it does allow one to rotate it to
minimize a source of interference. But if you are limited to just one antenna,
then it might be worthwhile. I've talked with maybe 6 hams that have owned
them. While it does give them 40 meters, performance is not like on 10, 15,
20.

Best of luck with your decision.

73s,

Evan