I've had a lot of trouble with HP laptops where the text input jumps from where I am typing to the location where the cursor was previously. Suddenly you're typing somewhere in the previous text. Extremely annoying. I had to turn off the touch-pad completely to prevent this happening. I use a mouse exclusively, so not a big deal for me. This occurred on the last two HP machines.
My work laptop is a Lenovo, and batteries are really sketchy. My most recent one had to have the battery replaced when it was brand new!
I've beat the heck out of my iPad2 for years with no problems.