Which is the best lawn mower?

80-Volt Max Brushless 21-in Push Cordless Electric Lawn Mower 4 Ah

I used the Stiga Collector 39E, then I tried the Hyundai LE4210, and I liked both. Then I moved to another house where the plot is much larger, and in some places, the ground is uneven, so sometimes my lawnmowers couldn’t cope with the terrain. I asked my neighbor how he manages this, and he advised purchasing a string trimmer. At that moment, that was the first I’d heard about it. So I did some online searching and read an article at Ego String Trimmer Review - Trim That Weed. Sounds like something for my specific case.

The Husqvarna MZ61 42" deck is an excellent choice. It's been around forever, cuts excellent and holds up well.
But it's mostly to know a fews information about lawn mowers before ordering. I'll suggest reading this review before choosing anyone.
Hope this will be helpful for you.

I have recently purchased the Black & Decker MM875 19-Inch 12 Amp Cordless Lawn Mower and I am very happy with it as it is extremely light and easy to use. The Black & Decker MM875 is a 19-Inch 12 Amp lawn mower that can be used in all kinds of lawns. It features a 12 Amp motor and an 18-Inch cutting path. The Black & Decker MM875 can be used in and around trees, flower beds and other obstacles because of its swivel and fold adjustable handle. It's powered by a lithium ion battery and has a quick release handle . It also has an ergonomic and comfortable handle for better control and easy maneuverability.

I'm currently using Stiga Collector 39E

Lawn mower choosing is not so easy as everyone think. Beacause of like for flatlands lawn have others model and for mountains or hills there have others model like these.
If your garden or backyard is hilly, the mower's tires and deck size and adjustability are the most important features.