I've recently bought one, I've been using it for about three weeks, and I can't fault it. I had to pay twenty quid for mine, but I won't hold a grudge if you get it for fifteen.
PS I also bought a SIP for about £38 from Toolstation and I'd recommend that as well.
We bought the Lidl equivalent and find it pretty good. I can't say how Lidl/Aldi compare to top end auto dimming helmets but I think you'll find it a decent step up from non dimming. Keep your receipt and take it back if you're not happy with the performance.
I got one a few years ago. It's fine, but struggled to trigger when I way playing with TIG on thin stuff at low amps, so I ended up getting a more expensive one with 4 arc sensors.