I wanted an ampless rig and decided to try out the Iridium after using Line 6 products for some time. And the Iridium is really great! It doesn't pack all the features and possibilities that the Line 6 Helix family does, but it excels at the amp simulations! The stock sounds are good, it's easy to approach, use and dial in. There isn't much of a learning curve, you just plug in and play.
If you want to do some tweaking you can, but the point with this isn't to change a lot of parameters. If you want to try out some other IR:s it is easy enough to change out the stock ones. I personally prefer York Audio IR:s, but there really is no need to go down that rabbit hole since the stock sounds are good too.
Now this sits and the end of my pedalboard and I'm very happy with the tones I get!