Bought a top end Miele c3 Allergy brand, the roller wheels on the bottom of it were terribly designed so much so even for a strong bloke I found I had to pull it constantly as cleaning the flat. Even the £30 vacs have giant wheels and are more easily to roll along the floor, such poor engineering and designing from Miele it had to go back for a refund.
I hear bagged vacs are the best and according to that reddit bloke they are but once you go bagless or even cordless its very hard to go back to the old style, the speed and ease of use just outweighs going back to a corded bagged vac imo.
I wish Dyson or other stick vac producers followed suit with dyson into a more easy waste disposable system and improved weight or unit and battery life but they are still a bit behind. Hopefully Dyson V9 arrives with bigger battery or swappable battery.