If you're referring to Galco's Royal Guard or Summer Comfort I would say don't. Not because either holster is unusable or uncomfortable but because there are much better holsters especially for $90. If you are looking for that style of holster don't mess around with the Galco. Call up
Milt Sparks and order the original Summer Special or another one of Sparks high quality IWBs. The Summer Special is far superior to any Galco product and is about $30 less. Galco's stuff is good in a pinch but the Royal Guard design fails to achieve what the Summer Special does so well.
As far as comfort goes it’s largely dependent upon the person and their specific build. Some people love IWBs, my self included, and some people hate ’em. I have worn a full size 1911 16+ hours a day in an IWB holster for years and can tell you that it’s my favorite way to carry a handgun. You’ll probably need to experiment with different holster styles before you find one you truly love.