When my car was running, I ran NT01. They are ok but not great. They are a lot slower than the A050, Hoosier A6.
They just do not have a ton of grip. They do not meld with the road like the other tyres. The A050 or Dunlop are more expensive but a far better tyre. They completely destroy the NT01.
When they get up to operating temp they cannot handle being pushed for more than a few laps.
At Winton I run 1.37-1.39 consistently but after five or six laps they would start to protest so I had to take a little out of lap times (est 1-2 seconds) for a few laps then get back into it. At Wakefield they would be at least three seconds slower than the Hoosier/Dunlop/ Yoko and not as consistent. I had work out, five year old hoosier which were way quicker than these tyres.