Over winter I bought the AA set of PRR tuscan F3's. I had to install new traction tires, lube them, and had some trouble with the "dummy" coupler on the lead powered A unit. I replaced that and they run great!
Yes they buzz, but I may or may not even mind that- if it really bothers me- I'll install a Dallee reverse unit.
I wanted to install and engineer and conductor- but in the A unit with the two motors- no room. So- I installed the figures in the dummy A, run the powered A backwards as the second loco, pushing the dummy A- and who can tell!!
At $100 I think they are fine.