I have one, and also had a G27. My 26 is a mate to my G34 - the Glock of oddly magical goodness. Bit thick for pocket guns, roughly double the capacity of a J frame. Sort of heavy. Works in some pockets, but not others. Never tried carrying one on my ankel, though some folks do.
Makes a great BUG to a larger Glock.
The 26 is perhaps a bit less snappish than the 27, but it might well depend on ammo and the individual's perceptions.
Really not much worse to carry a G26 than a steel J frame, at least I don't notice the few extra ounces.
Many people can shoot a G26 about as well as a G19.
It's probably less useful than the mid size Glocks if you carry it IWB or OWB since a G19 can go most of the same places that a 26 would and may conceal just as well. For OWB carry, I don't have a problem with the G34, it's about the same size as a full size 1911.