For the price you get a real performer. High wattage at a good price. I have them coupled to a pair of Bowers & Wilkins CM6S2 and they sound quite good.
I previously had a NAD M22 coupled to them, and while the XLS 1502 does not sound as good as the M22, at the price point of the XLS 1502 I think it is hard to beat!
The only downside I see to it is that it does not have an auto on/of. You have to turn it on and off manually.