Whether they are "good" or not is subjective. It begs the question, "Good enough for what purpose?"
If you *need* the best construction, the *best* optical quality, and the *best* features, then, no, they are not for you. I have a pair of Barska compact binoculars that are fine for the uses I need, such as sporting events, etc. Would I choose them if I was scouting enemy positions at twilight? No.
I'm going to pay about 100 bucks for a 15X Barska spotting scope. There is absolutely no reason why I would need to spend more for the range use for which it is planned.
Part of the reason they are inexpensive is that they are made in China. I have found many Chinese imported products to be reasonable quality for the price. Keep in mind that computer technology has made the grinding of "good" optical elements possible at lower cost than in the past. Just as CNC machines have reduced the production cost of complex machined parts.
If you are wanting a scope for the most demanding of tasks and conditions, then you will likely have to spend more than what a Barska costs.
K