'Dome'/Round BBQ from normal type

[Frimley111R]

I have always had rectangular flat type BBQ, the traditional type where I put a couple of bags on the base, light them, give it 20 mins, spread out the coals an off I go. It seems the number of these is quite limited now and these ones with the coals in a sort of 'can' that you then light and when ready, tip out into the bbq look interesting. But are they that good? Have you swapped from one to the other? (I think the Webber ones are like these).