Anybody running these cheap no name co2 generators?

A couple of my burners need replacing and I'm probably going to replace a whole generator to. So after searching around I noticed that their are a lot of these no name brands going for half to a third of a sentinel. Curious on their reliability , I always buy brand name goods but for a generator there's really not much going on technically. If anything I'd probably swap out the safety circuit with a sentinel or honeywell for $50 and I should be golden. Anybody with experience on these?

I rock exhale bags. Cheap, safe, simple and effective.

My rooms are too big for the bag method. I tried them in a small pheno finder room several years back and I couldn't get over 980ppms , even when I added 2 more it barely brought the ppms up from where they where. Now I use generators and tanks, when the ambient temp is high the tank comes on, if the temp is low the generator comes on. If my ppms are below 1000ppms they both turn on(think its 1000).
I have my co2 right where I like it, gonna stick with this until some new revolutionary method comes out that saves me money. Lol