It's harder finding Cat5-6 jacks that fit side-by-side in a Leviton 41646 (a 6 hole keystone Decora insert, Monoprice #6837 gives you two of them) and a fills a 6 port. By my caliper measurment they're about 17mm wide, a touch wider than the Cat 5e version (#15687 which is ~ 16.2mm). By contrast the regular punchdown cat 6 is wider (#5384 which is ~18.1mm) and DOES NOT FIT side-by-side.
That said when I can I prefer to use the non-rotated jacks (# 5384) as: * You can't check the color coding after you start punching (other jacks have color coding on the outside) so I've already screwed up one.. * The cable isn't as secure if the wire is tugged on.
I'm sure the first point I'd overcome, but for a DIYer it's not likely as I only have a few jacks left.
Very easy to punch with a standard punch tool, making a very reliable connection. I found it much easier to use the the standard Cat-5e ones where the cable lies parallel to the punch contacts. In this case, the cable comes straight out the back making the length of untwisted wire much shorter, ultimately making them very easy to place in a keystone wall plate or box. They are plenty narrow too, so they can mount side-by-side in a six-hole plate.