I've had one in my car for a long time now. About 8 years. It's still going strong without a single issue after many auto-x and track events. The original died at my first autox even.
With a 255 from tire I'd say the weight is just right. A 285, it's a little heavy. Only one issue I've ever had was during autox. During extremely fast turn-in you'd hit the flow limit of the pump and it would feel like you hit the stop. By extremely fast I mean probably as quick as I'm physically capable of turning the wheel. Not an issue for 99.99% of driving.