I've been using one of those Wickes vacuums for about 3 years now, as a hand-held dust extractor on the router and general shop clean-up machine (including aluminium swarf off the milling machine and all). Gets a fair bit of abuse, sometimes a few hours running continuously, and just gets on with it. The internal filter (I fitted the wet&dry one which is an extra) does get clogged with MDF dust fairly easily but it cleans reasonably well by holding it over the dustbin and tapping. I didn't really expect it to last as long as it has.