This is my first Mountfield and to be honest I am not that impressed, built quality seems good although there are no instructions on putting the grass collector together which is fiddly if you don't have young hands.
It starts well it cuts short grass well but who cuts short grass? My lawn is about 20 by 20 foot my previous mower needed to be emptied twice this one requires five times. If the grass is longish the grass cuttings start to come out on the rear wheels. Also if the grass is damp or again longer than two inches it will clog up and stop. My old mower had no problems but was slightly more powerful.
Now to the ridiculous design flaw. To empty the grass collector you have to lift the flap with one hand and manoeuvre the collector under the handle. The old mower was a one handed operation and easy.
As you have probably guessed I would not buy this model again.
However the positive over my old mower is the weight makes it a lot easier to manoeuvre and one of my considerations when buying. Also it's easier to start but it's new so long term who knows. But the extra work involved in keep emptying it and raking the lawn after cutting means it's going on eBay after the summer and I will purchase another lawn mower.
If your lawn is about 10 foot square and you like to mow it every week this is probably a good buy for you. Any bigger it's not worth the hassle.