It seems to be pretty good, but I can't seem to get an extended run in without tearing a tire or two off the rims.
I have run on and off for 20 or 30 minutes or so. I ran around my backyard track for at least 30 minutes on and off.
I have my lvc set to 13.2 so that may cut me back a few minutes. Better safe than sorry.
If it will stop raining I take her down to The Grove and try to get some practice in. I'll post back with the results.