I brought the Thalls at the start of this season after spending 2 years on a pair of Ar6's. I liked the tanner but it really was not much of an all mountain ski at all. In the park its good, nice and reasonably soft to make nollies, ollies and butterys smoth. Out side of the park its a bit of a dog though, so if your only going to ski park on these skis and want a soft ski its not a bad choice. Durability is not bad, edges have no cracks yet but are very beaten up. Also the top sheets are pretty scuffed. No issues with the cap tip and tail yet but I do wish they had full sidewalls still just in case.
In december I was given a set of 2012's to ski for the rest of the season. I thought I would not really ski them much. I did like the idea of them but like Im sure a few people here may also think I questioned the durability. I tried them out and instantly really liked them. The twin rocker makes these skis so playfull, you can get them spinning so easy and you never catch tips of tail. They fell as soft as teh tanners but are infact much stiffer, its just the rocker that makes them so easy to move about on. I also really like the slightly wider width for both all mountain and park. They can even do some powder which the tanners really cant. I like them on rails and they fell solid on landings. I think the tanners actually feel better on jumps but I prefer the 2012's for rails and boxes. Durability wise the edges look about the same of the tanners but do have 1 crack, however this has not had any effect yet. They top sheet wise are alot less chipped then the tanners.
Overall I really like the tanners for park stuff they are pretty fun and really easy to butter, but overall I prefer the 2012's. They are the most playfull ski I have ever been on and make a great all mountain ski too, which was one reason I rode the ar6 for two seasons. I prefer them for rails and so far they holding up well. They also feel like a smaller version of my rocker 2's so its really easy to switch from park ski to powder ski.
Hope this helps