After eight years of service, the ancient Makita 3310 stopped functioning. Since there is a comparison with the one before it: - the plastic of the 3310 is considerably stronger; it even tumbled down the stairs a couple of times, but it did not fracture; nonetheless, it is unlikely that this one will be able to endure such a crash test, although in general we try to exploit such things cautiously. -with regard to the knife, I noted the "flaws" on the earlier SO and described how the knife started to look after a few years had passed. Everyone is responsible for coming to their own conclusion on their own time. However, the -3720 is much lighter, more agile, the wheels do not spin when reversing, and the height can be adjusted in a manner that is far more user-friendly. I won't go as far as to say that I'm unhappy with it since, while it's true that they used to make it stronger, I suspect that this is the situation with the majority of brands these days. Although I don't feel very thrilled about it, I believe the device as a whole deserves consideration. The cost associated with acquiring such power is typical. Accessories are available. It cuts even at the highest "3" is still a bit short, for us it's rather +, it will need to be mowed a little less often, but it won't make a beautiful carpet, unfortunately) I can't advise those who choose a lawn mower for a sports lawn because it cuts even at the highest "3" is still a bit short.