I bought a very cheap one many years ago, and really like it. Far better than flipping down a manual one, but I’m only a very occasional welder, so have nothing to compare it to. The actual mask itself is very flimsy, but the auto-darkening glass bit works a treat. I will probably transplant the glass section into a better mask at some point in the future.
Were I a more enthusiastic welder or be doing lots of fiddly stuff then maybe this would highlight some flaws in my current equipment, but for what I do, cheap has worked fine.
A quick look on eBay shows that you can get them for £20 these days!
Reading your question again, noticing the need for robust, maybe cheap and cheerful isn’t the way forward…
Cheers, Rich