www.reddit.com/r/FDMminiatures/ will give you an idea of the level of quality you can reach. With the smallest 0.2mm nozzle, will it reach resin levels? Close but not really. Is it good enough for me to screw around with, improve my painting skills, and play casual games? Certainly.
Also I subbed to the OnePageRules patreon, they offer alternative minis and rulebooks that are very similar to GW, with an alternate for fantasy and 40K, as well as fleet battles and other stuff.