To be honest I absolutely love it. I prefer AMD systems anyway and almost all of my other builds have been AMD based.
In the past though the difference between AMD and Intel boards seemed quite a gulf in terms of quality, parts used (again quality) and general overall desireability.
This difference has now been equalised especially with Gigabyte which is the manufacturer i prefer to use.
Opening up the GA-AX370 seemed just as feature rich as my previous Z97X Intel board which I'm really pleased to see.
In terms of performance.. Love it. The 1700X feels a little like the 4790K but only a little. I only had to use it for a short while before noticing that general use seems quicker overall.
Benching wise, well being primarily a gamer i almost always use 3Dmark and after benching the 4790K for a while 16,500 approx was around the norm.
Ryzen hit 17,301 within a few benches (overclocked to 4GHz)... so I'm incredibly impressed as well as happy.
General use I keep the chip running at stock as it's simply fast enough. I can easily recommend this chip Keith as well as the motherboard. AMD shows us it doesn't have to be overly complicated to be fast and feature rich.