This is the type of machine many people in Hong Kong have:
First, notice the size (850 x 400 x 600 mm): it's a bit over a foot wide, a couple feet deep, and about 3 feet high. It's tiny, and because it's top-loading, you don't need a bunch of space in front of it.
The apartment we stayed in in Hong Kong a few years ago had one that was built in to a corner of the kitchen. You had to reach over a couple feet of counter to reach it, but all you needed to fill it was an opening of about 2x2 feet.
It's a tumble washer, just like a front-loading machine, so it's very efficient in terms of water use. As with front-loaders, you can get them with a range of spin speeds, different cycles, etc.
The only pictures I've found that give you a sense of how
the drum opens for loading and unloading is in the user manual, which you can look at if you want.
Except for uncertainty about running one here (HK is 220/50Hz), we would've bought one and brought it back. I couldn't get enough information on transformers in time, and I'm still not sure if the electronics will be ok on 50Hz. If it would work here, it would take 1/2 the space of our current machine.