I own an XDM .40 3.8 Black for everyday carry and love it. Previous to the XDM, I was a hardcore Glock owner for many years. I have sold my Glock 22, and currently have my 21C for sale and have no intention of going back.
I have owned Gen 1, 2, and 3 of the Glock family in 9mm .40 and .45. Models 17, 19, 21C, 22C, 23. Once the 21C sells I plan to replace it with XDM45 4.5 or 3.8 (if they come out with it by then).
The XDM is very accurate right out of the box. So far I have only put around 400 rounds through it, but I have had no malfunction of any kind.
My wife lost here job recently, so I have not been able to do any modifications to the XDM, but one of the first things I will be doing when finances are back in order is installing a
Powder River Precision Match Trigger Kit.
Some people think the stock XDM trigger is great, so I guess it all depends on what you expect out of a trigger. IMO most production guns, don’t have great triggers, so you will have to make up your own mind on that one. Also some aftermarket sights would be in order if you enjoy that type of thing.
One thing to keep in mind is that the XDM is a little heavier than the Glock, but the XDM does seem to have less recoil because of it. Just personal preference, and something to consider if you plan the XDM to be your full time carry gun.