I have a Denkmeir "Big Easy" and have used it with 8 and 12.5 inch dobs and 80 mm refractor. It came with the OCS and I have not had problems coming to focus in any of the scopes...sometimes I have to "reconfigure" the components but it has always worked.
I use a pair of Denkmeir 21 mm eyepieces and some 15 mm TV plossls...both sets work a treat.
As has been noted, planets and moon are wonderful...bright objects (nebula, globs etc.) look fine too. Unfortunately, fainter fuzzies seem to get lost a little easier and at least to me don't have the same "wow".
Balance is a bit of a chore especially with the 21 mm Denks on the dobs...refractor has been no problem.
Two basic schools of thought...
#1 Go cheap and try it out...then if you like it get something nice (expensive)
#2 Get the best and enjoy for a lifetime.
After some study at lest for me I felt the "Big Easy" package was the best of the "cheaper" options. I have been pleased with them and my only complaint (and it is small) has been the need to rebalance because of the added weight...it is not hard but is a bit of a hassle when I switch from mono to bino and/or back.
Good Luck!
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