The message .com
from contains these words:

This is true of most junk end products, some survive some dont.
Henderson are most popular because of price, but the mecha simply isnt
upto reliable performance. Of all the garage doors I've dealt with, the
ones with bust mechas were in almost every case Hendersons, and the
ones that wouldnt open and close smoothly were in almost every case
Henderson. If you want such kit, go for it.

It's also quite possible that they were better made twenty years ago.

--
Skipweasel
Pay no attention to that man behind the curtain.