i've never ridden townships so i can't comment on them i'm afraid but i have ridden antidogmas and infrablacks and i can vouch for the brand as a whole. the quality is excellent as is the ski's performance. antidogmas ride like a cross between ar6s and karmas i.e. high performance all-mtn twin and infrablacks were dope too. i believe the township is a more pure-park twin than the antidogma and i can't think of a reason why it wouldn't be as good as amplid's other skis.
i just got a pair of townships a couple weeks ago but have only used them in rail jams so far. i'm probably gonna ski em this weekend so i'll no more after that. so far, they are a great rail ski, super low swing weight and have durable bases. seem a bit softer than the antidogmas but not a whole lot. as far as the company goes, seems like great quality and having met some of the guys that work for them, they are super legit and are definitely stoked on the skis as well.