I've always been intrigued by them
I used a Haier top loader when I was in Beijing last year. It did a fairly good job, the rinse was amazing, it left everything very soft and had good extraction. I though it would be rough on the clothes with the impeller but it didn't seem to be really. My only issue with them is that they're cold fill only and have no heater. I simply could not be dealing with that!
I'd like to use an Aussie version cos they have a hot fill too
Matt