I've been running APS filters for a couple or years now with no issues.
Two points I'd like to make. The first is that, from what I've been told, UVs don't do anything much of benefit in freshwater tanks, so it's unlikely to help with your algae problem.
The second is that the stated flow rate is for an empty filter, with no media. Once you get media in there, the flow rate will drop by around 40-60%, so you might want to get the next size up. I have one of the 1400lph models on a 180l tank and, tbh, it really only just manages to cope.
If you can afford it (and have the space, they are huge!) I'd recommend you go for the 2000lph version.
One last thing, do bear in mind that to make these so cheaply, something has to suffer, and in the case of these filters it is build quality, especially the media baskets, which are a bit flimsy (although much improved in the new version). Having said that, if you treat them gently, and wiggle them until they click into place rather than forcing them you won't have problems.
It's still a filter I highly recommend, personally.