They recently significantly increased their prices, if it helps sway your decision.
I have had a polycarbonite Rimowa checked suitcase for the last 4 years and whilst I've been pleased with the smooth running of the wheels, I've been disappointed with the overall quality. The case itself began to deform within a year, and all but one of the raised bumps on the bottom have been knocked off, 2.5 years in one of the corners around the zip started to come apart and on a recent trip it cracked either side of the main handle leaving me worried a sharp pull from a baggage handler would cause the whole thing to come apart.
Since it needs replacing I was on the fence about another Rimowa anyway but the 50% price increase on my model made the decision easy.