Found them to make the grip fatter and rounder. Due to the fatter humps, you are also less likely to touch the slide release if you have a traditional high forward thumbs grip. This was not part of the design of the grips though. Just because it is quite fatter, you are less likely to stop the slide from lock back on last shot.
I found the finger groove Hogue grip also splayed my fingers preventing a true snug under the trigger guard grip. This has to do with finger width. If you have more slender fingers, this may be an issue. If you have chubby fingers, it should not. Ironically, this situation does not arise with necessarily all Hogue finger groove grips...even for the Rugers.
The fatter, round grip profile not only affected my positioning in my hand but affected trigger reach for me.
The originals work fine.