Neil Roessler wrote a review of Scarpa Instinct Climbing Shoe - Discontinued Vibram XS Grip2 on August 2, 2013
Familiarity: I've put it through the wringer
Fit: True to size
I have been climbing in this shoe for months. I am an instructor at a climbing gym and put at least 5 hours of climbing on this shoe per week. The vibram rubber is excellent, in the past 5 months I have had this shoe, I am still climbing in the original rubber.
In addition,this shoe compares well to the Evolv Shaman or La Sportiva Muira. It is very aggressive and solid on overhanging routes, dime edges and bouldering.
My main complaint is the heel cup. It is a bit loose for the type of shoe so I do not have 100% confidence when heel hooking.
Still, out of all the shoes I have worn throughout the year, these are hands down my favorite.
Sizing: I wear a 9.5 street shoe and wear a size 40 in the instinct (7.5). The leather upper stretches enough to make it work; however, I could probably get away with an 8. That have a bit of a break in period so just be prepared that they are not going to feel good for a few sessions.