I have the TF89 .177 and the .22, and I also have a Walther Force 1000 -- same gun, different stock. In fact there are quite a few different AR1000 variants sold by different manufacturers.
I had both my TF89s tuned by Gene. They started out nice shooters, but when I got them back they were super. I'd put them side-by-side with $400-$500 guns, which I own. And I got mine for $149 and $119. The Walther was $69 with shipping included. So, all told, if you shop smart, you can get an AR1000 .177 refurb with a tune for $250. It'll outshoot any gun at $200 more...except the TF89 .22, which I happen to prefer. Unless you happen to find a tuned Cometa Fusion Star for that ;-)