I endured several years of my mother telling mem4-wheels was much better than the 2-wheels I was dragging around (both carry on and checked). I resisted. Then I needed new luggage, and yes, for me 4 wheels are much better. I don't strain myself pulling them when they're heavy, and walking posture with them is just less stressful on my body. You can't 4-wheel them up and down steps and rough terrain, but then you just revert to pulling them like a 2-wheeler. No regrets about going 4 wheels here, a and with a slight weight and capacity penalty (although mine are lighter than the 2-wheelers they replaced).