A year and a half would be totally unacceptable to me. I've had positive experiences with two different retippers on four different jobs and never had to wait more than 3 months. Turnaround was inside a month on two of those jobs and one of those included full coil replacement.
18 months is ridiculous IMO-I'd consider that very poor service and, regardless of outcome, not go back. But to each his own.
18 months is ridiculous IMO-I'd consider that very poor service and, regardless of outcome, not go back. But to each his own.