Personally I hate it as I have a two step process.. First I have to go around and demining the back yards. That takes about 20 minutes as the two mine layers seem very prolific in their efforts. Then hauling out the mower and actually doing the job, that takes another 30 min :( Course now that I have a sharp(er) blade it takes a few minutes less. For some reason though, I did not think your lawn was as large as mine, even with the puppy related delawning that occured over the winter.