The Poulan riding mower I purchased has been worthless, I can't keep the blades level even though I am only cutting a level lawn nothing tougher. The leveling devices are no help. Stay away if you value your money.
Poulan riding mowers are known for their reliability. My friend has had his for almost 10 years and he has almost 10,000 hours on it. I talked to a Sears mechanic and he says they are the best.
Please for the love of God do not buy this model and brand. I have a Pro PR550N21RH 21 inch and I have nothing but grief from it! The bags don't stay on and the wheels are loose!
