I am glad that you raised this question.
I have used Simmons and Bushnell and Weaver scopes in the past and had no problems with them. Last year I bought an NCStar 2-7 pistol scope for my .17 HMR barrel. I was happy with the sight picture and adjustments and most of all, the price: $41. I just bought a second on to go on my .22 Hornet barrel. My thinking is that I am using these barrels for the range, generally. They are not likely to be banged around or dropped. The weather is usually clement so they are unlikely to get drenched. I have used them in times of high humidity when they are coming from air conditioning and, so far, I have seen no signs of condensation.
My thinking is that the definition of "good", for me, is fitness to task and for ~$40 a pop, I'd rather have the loot saved for more barrels.