I had my eye on these IMS pegs for a couple years for my trail bike. I finally bought a pair for a recent 10 day Utah desert riding trip and got in 1200 miles with the pegs. Here are my thoughts: 1) the front edge is in the same location forward as the stock pegs. 2) the surface is about 10mm taller than stock. 3) the back edge of the peg is up 10mm and back about 25mm farther than the stock pegs. 4) they extend about 15mm farther out than the stock pegs.
Since they stick out farther I hit them a lot while climbing and descending steep, rocky (bigger than basket ball size) mining roads. Didn't stop me, but it was irritating.
The taller pegs caused my center of gravity to be higher. Wasn't really noticeable, but higher CG is not good.
I liked my weight being back farther while descending very steep trails and in track-stands to choose lines, trials bike style.
Because they are higher and stick out farther, I occasionally smacked my shin while kick starting. That part sucks. I had a huge lump on my right tibia for several days. The skinny new shin plate on the Alpinestar Tech 8's have a soft spot right where my shin hits this peg - so very little protection from my boots. I made sure I sat back pretty far before kicking, which helped.