I've bought 24v drill, router table, morticer and bench grinder/belt sander.
The drill is good, a bit on the heavy side, but it drills and the battery lasts reasonably, although not if left in the charger. A good brand would provide as much power for less weight and longer lasting batteries, but not for £25.
The router table has only been used a few times. I have put my big Triton in the bottom but it was a bit of a fudge. I haven't bothered with the side tables and I really need to replace the fence but it's good enough for occasional jobs until I build my own.
The morticer I'm less happy with. £60 I think. The machine itself is big and heavy and has two posts to slide on. Power seems to be OK in softwood. However, the fence didn't hold very tight, the holddown didn't fit, the depth stop kept slipping, the chuck fell out and it was lifting a bit when withdrawing sometimes. A variety of fettling has fixed most of the issues, and I'm sure buying some decent chisels (rather than silverline) would help as well. Overall though it's taking up valuable room without me being that confident in it. I need to use it a few more times to justify the cost then it's being freecycled (as I assume I won't find a buyer for it).
I recently bought the sander/grinder as I thought there's not much that's critical in that. I'll replace the wheel and if it spins then it does the job. I have yet to turn it on though...
My opinion on Aldi gear now is that if you want it to do a basic job then it's generally good enough. However if it's a tool with adjustable parts that needs repeatable accuracy then look elsewhere. I left the biscuit jointer well alone.