I have one in steel and one in polymer (both bought as range kits, so now I have 6 mags in total + 2 holsters + 2 holsters for mags).
Haven't shot a polymer version yet, very happy with a steel-framed one.
I really like them both. Both feel great in my hand, far better than any other gun. Love the design too. Very simple field assembly/disassembly.
Can't say which one is better - love them both. One is "heavy and reliable" all-steel, another one way lighter and super-ergonomical.
I don't really know why they are so inexpensive and unpopular. In my opinion they are very good guns, at least not worse than popular and more expensive ones (like CZ-75 and M&P, for example).
But I strongly recommend to handle gun (or better shoot it) before buying, because there is always a chance that you won't like it for some reason. I rented few pistols and took a look at many pistols in a gun store before buying my Jerichos.