We have been using Mow Cow for several years. We get reliable lawn mowing and care (fertilization and weed killing).
The only issue is the use large mowers and if you have tight corners, say around a swing set, they are likely to dent/damage the items as they buzz around on the large mowers. In our case, the swing set is old anyway.
Otherwise, they do a great job. They may fall behind if it rains, as will all lawn services, but they always catch up without us needing to call and question.