I have a 35 that I got a few years back. A little more flip than the 22C, but not much. I don't like the extended slide and mag releases on mine, but that is just me. Others put those on as aftermarket options, but I am so used to my older 22C they never felt right. Trigger pull is nice, I think 3.5#. Sights are adjustable, but I've never touched mine. They have a big oval cut in to the slide, behind the rear sight, to lighten it, but no compensator option that I'm aware of.
The only "modification" on mine is a Hogue grip sleeve, which stays in place really well because of the finger grooves. I suppose that is standard now on all Glocks. It would be a great platform to trick out with an oversize mag well and all that stuff for competition if you're into that.
Great target/truck/house gun, but I would not feel comfortable CCW everywhere, year round. Just a little too long, or I'm a little too used to my 27.
I probably should have just got a 24C upper for my 22C if I were to do it again, but I won't get rid of it now that I have it. All it really does for me is lessen the wear on the 22C, and gives me another frame if I did want to trick it out with all that competition stuff. Of the 4 Glocks I have, the most I've done to them is add the grip sleeve, buy a spare barrel of two, and I've lightened the trigger of my 22C since it is not a carry gun. I like them the way they are.