I've got a Black & Decker electric mower that's now ~15 years old, still works great. Have replaced the battery twice and sharpened the blade 2-3 times. Frankly I'm amazed its lasted so long, but having taken it apart for maintenance, the internals are really simple.

People sometimes swear by their brand of power tools, whether its Milwaukee, Makita, Bosch, DeWalt, etc... but here's the ugly, ugly truth - and this is me speaking as someone with a past in high tech electronics manufacturing.

All consumer-grade gear of this type is essentially crap now.

In the race to make their products less expensive, more and more corners were cut - way beyond a reasonable point of cost savings. Chineseum materials and manufacturing dominate virtually all electronics today. It is utter crap. Poor design, no thought for longevity, molds that are used way past their prime for making plastic housings, motors all built by 12 year olds in sweatshops, that's what we've come to.

There really is relatively little left to differentiate the major brands today. Heck, many times the actual internal parts like motors and switches are made by the same vendors in China.

Now, if you're looking at industrial-grade / commercial gear, that's a whole different story for some of these companies. Aside from that, when choosing your mower - I'd say look at the specs, pick your poison & color of choice, and throw the dice.

P.S. For warranty service, be aware most of the big stores like Lowe's, Home Depot, et al... do not help you in any way with facilitating warranty repair/replacement. If you bring a broken tool under warranty to their store they'll usually tell you to contact the manufacturer directly for an RMA number. Customer service has declined across the board in most places, and fast. It didn't used to be this way.