Good question! It has been very reliable for me so far. As much as I love it I wouldn’t pick this for my only mower if I was doing 100 lawns a week. It’s a little slow ground speed wise and it’s not a full blown commercial stander (the regulars revolts are and I would recommend one of them instead for that many lawns). This mower is perfect for 50 or less lawns a week or as a secondary mower and gate getter.