I've been reading a lot of postings on various forums about Traeger's lately.
A lot of them are complaining about poor build quality. They are made in China now.I was looking at the Traeger line before I bought my pellet pooper and decided to look at a couple of other companies units.
I ended up buying a Memphis Pro and couldn't be happier. It has an insulated cabinet and it's got a gasket in place, to maintain the temps.
It has what they call a ITC controller and it works great. Goes from 180-650 degrees. Another real good line in the MAK 2 Star General. Both these units are USA made. Shop for prices at bigpoppasmokers.com. Great prices and even better customer service.
Go to pelletheads.com for a lot of info on pellet cookers.
Good luck with your choice.