I'm assuming that you mean the Alite 1000? There isn't a model called the AM1000. I have sold many of the Alite 1000's in the shop, and they seem to hold up very well. I own a couple of the KHS models, Alite 2000 and the 535. They are deifnitely one of the best values out there!! Hopefully over time the weight will come down a bit on their models, otherwise I'm very happy!
There was an AM1000 & AM2000 from 2005 - 2007. They are generally well regarded. It is similar to the frame PricePoint sold (now discontinued) and that was well regarded. I don't have personal experience as I have a few 5X5 series, which I love.