21 ounces and 54 inches.  Does the wind blow where you live?  Even 5 MPH?

NOTHING beats a good, 40 size balsa trainer.  You want air time, not sitting around for months waitng for a day with no wind.  Heck, I bought a 35 inch foam Yak 54 2 years ago and only lfow it a very few times because of the winds here in Connecticut.  And I've been flying for mearly 20 years.  Even my 43 inch balsa bi-plane was much easier to fly.