I bought de walt and it broke within 6 weeks. The shop told me I'd misused it and refused warranty (like, without even looking at it) so I sent it directly to de walt who dismantled it for inspection and sent it back in pieces saying the gearbox was damaged. They also refused to repair it.
I had a Skil which also lasted a few weeks but the (different) shop took it back and refunded me when it crapped itself.
I went to Wickes and bought one of their own brand drills (Bosch in a different dress) and I've had that for over 15 years with no troubles at all.
None of these were cheap diy stuff either, more in the range of £100 - £150 back then, and what I would class as professional power tools.