I have a Go and a Go Me (I think that's the name of it- the small one). I love them. The mats eventually wear out but they aren't expensive. I haven't had dies get dull yet. They're quite sturdy.
One thing I don't like are those classes you mentioned. Talk about boring! I couldn't finish it. It seemed like they just rambled on and on.
I think Accuquilt is really pricey though. But I love the precision it affords.