Ive never had a problem with Dell notebooks, but ill relay a quick story…
An old roomate of mine bought a Dell of the same spec as my macbook, he got it for around $200 cheaper than mine. However when it showed up not only did I have to spend a day unfucking it of random bullshit that Dell preloads, it was also more than 2x the thickness of the blackbook…so yes its cheaper but its large and not very portable.
I personally bought the mac for its ease of portability and he ability to never have to fuck with M$ again.