Are there any opinions/experiences about this kit?

Good choice if you like to work with wood. A good, simple, basic plane, but
most end up a bit overweight. Lots of unfinished projects out there to make
the initial investment low. Just keep an eye out for one with few
'enhancements' and good workmanship.

As for speed - the claims are about as accurate as fish stories. Same as with
most home builts.

No matter what brand you decide on join the corresponding Yahoo group and do a
bit of research.

My opinion - it can still be a good plane and was in it's day - but I'd look
for something that has taken advantage of newer methods and materials. And
don't overlook ultralights or a rebuild of an old T-cart or Knocker.