I've been testing my dust collector for about a week now. It really works well in static situations like hooked up to my table saw or other tools. There's plenty of power and pretty much all the debris gets trapped in the collector.
If you use it as a regular vacuum cleaner (sweeping the floor) you have to take care not to block the hose. If that happens, the dust already gathered in the bucket gets sucked up by the primary system.
All in all I will continue to use it in my workshop. And I'll probably build another one when I come across a transparent bucket :)