I have two Barskas, which I have used to break in barrels, load development, keep on "spare rifles", let the kids thrash, etc. One's a Benchmark, and the other is a Tactical. Both are FFP, and both get the job done. I did have to send one Barska back because the reticle was mounted improperly (not vertical).
I also have Schmidt and Benders, Leupolds, and have used plenty of Nightforces (but this was before NF went FFP), which I use on my primary rifles, for hunting and competition.
The Barska is certainly no competition to the S&Bs or the Leupolds, but it's not meant to be. Barska provides a cheap and somewhat disposable tool for limited use. If that's your intended use, go for it. If you mean it to be your primary optic for serious use, there are better uses for $500.
BTW, I've never even seen them offered for the "list" $900, and I paid far less than $500.