I-16 is super fun.
It's not difficult to operate, as it is simple. (No trim). The manual gear is a lot of work though, raising and lowering it...
Ground handling: Catches me out every now and then, when taxiing too fast, it suddenly just veers left... take off and landing: same, it's tricky, I still haven't figured out a way to do this properly with a predictable result.
It's guns are magnificent. Ground attack is what you are limited to, as anything in the air is too fast to catch, although once I got lucky and did damage to a 109.
You can load up with rockets.
Every now and then I end up with power loss on the engine, have not found out why yet, could be damage from enemy fire, or overheat - have not put the effort in of learning how to read those instruments yet.
In the end, it's a hoot, in my opinion.
Is it worth the money? Maybe not, because it is so very 'alone' - then again, it is a very nice thing to fly...