Pawlowski, I see this unit puts out a sine wave similar to the one in our AC plugs. This is the good news, for my 2 cents. Some of these UPSes do sawtooth at the output and that is truly not good for audio gear.
The bad news is that the device is really made for computers. It sits between the gear and the wall and delivers stored juice during power sags and outages, so that your hard disc does not drop bits and your machine does not shut down in a panic during a file copy, a volume header rewrite or any of the other delicate moments in a computer's life.
Key point: it sits between the gear and the wall. Therefore it is a potential bottleneck. Second key point: your audio gear does not really need what it is designed to do.
So as you say, the only thing to be gained by using it may be the surge protection. On the other hand, it may not do good things for your sound. At least it does not look, to me and only to me, as though its output will damage your gear.
However I am no expert. I have just owned a couple of these UPS thingies, some isolation transformers and a few other AC doos and dads. I notice that the spec sheet mentions "less than 5% output voltage distortion at full load". This concerns me, but I do not know why.