I mainly use powder gear. I like Ardex tubber D20. But, what happens when the walls are all out? Tubber gear will never go off after 4mm. I've seen that so many times with builders who reckon you can put up 300x600 with it! What if the plastering is out?
I love Mapei, don't care what people say. Their white slow set powder gear is great. And their fast set is great, it gives you a better open time then alot of the powder gear out their.
Ardex is good, but very expensive. Bal powder gear is very good.
I also use alot of Howtes grey & white SP rapid. Lovely stuff.
I hate, and repeat hate Nicobond, full stop. Their rapid set is set in the bucket in summer time before you can do anything with it. However, I like their tilers white grout, odd World!