I have been building these Ace kits for some time now. I just started my fifth one: a T-55 Enigma tank. If you want to see how they look, check out my WIP Thread:
http://www.finescale.com/fsm/community/forum/topic.asp?TOPIC_ID=12077
It shows some of what you can expect from an ACE kit.
I also have a few other WIP Threads I'm gonna post too.
Bottom line, if you are relatively skilled at small scale armor already, you'll be okay with these ACE kits. If not, I'd cut my teeth on Revell of Germany and PST kits. Both companies put out excellent kits with no flash that go together smoothly and tightly, and make outstanding finished models. I just started a PST Panzer 738 tank recently. I'll have pics up later.