I'll admit to having used one, as I bought one for my mother when she was living alone after dad died, and occasionally wanted to re-split some chunks of birch. I was actually impressed with what it would do for the cost and size. I was impressed enough that when it was on a sale really cheap I bought one for myself and used it for a couple of years.
I do use a Honda powered hydraulic one but never sneered at what the little electric contraption would do for its cost and size. As for brand--I think that might be determined only by which door it comes out of the Chinese factory where they are made.
A lot depends on expectations. If you get one with the 'how can this little contraption split firewood' impression, you'll be pleasantly surprised. If you get it thinking it should produce split firewood as fast and as long as a $2,000 gas-powered one you'll be (foolishly) disappointed.