If I remember correctly, I have the heat gun, the belt sander and the multi-purpose tool. Bought them mainly because occasionally I need them, and the asking price was right for occasional use. For my money, at least as good (if not better...) as the current Bosch amateur green line, which are much more expensive.
The heat gun is fine, the other two I have used too little to be positive. The belt sander especially makes an awful lot of noise, so I only dared to use it once, and that was outside on the balcony. Earmuffs a must, of course.
I can't vouch for their duration, as I use less and less often any power tool. Difficult to deal with the noise, the dust, and neighbour good will in a 7th. floor appartment...
G.