I purchased a Kobalt 20" Self Propelled lawn mower( Model #KLMS 2524A-03) from Lowes late last summer and when I went to use it this year, I immediately had troubles with it shutting off. I believe the problem was in the handle which had to be fully extended and clamped shut for the blade to turn. It wouldn't stay clamped. I wouldn't recommend this model because of that.
On the other hand, we called the 800 number on the manual, explained the issue, they gave us a return number and we took it back with no hassles! Kudos to Lowes for the good customer service. Oh, I bought a more expensive EGO mower from them.