My lawn is both hilly and bumpy. I switched from gas to electric 3 years ago, and it is sort of easier now, but the electric doesn't do straight uphill as well, so my 35 year old pattern has changed. Also, the electric simply doesn't care for any dampness. If I MUST mow when things are slightly wet, I have to clean the underside several times in 30-40 minutes. Still.. I don't have to buy gas, and it is quieter.