These should be equally capable when compared to their regular sized brethren. Reaching tall, thin items at the corners of the rack *might* be an issue (as it sometimes is).

Cleaning performance is great. The machine can deal with lots of soil, and ours has been known to gobble up plenty of rice - as the drain filter separated, only the filter, not the cover remains. So lots of trash does go through it somewhat regularly. 

Provided you use hotter cycles, which may or may not use a prewash regularly, the machines filter is self-cleaning. I believe one member has never really bothered, since the filter doesn't accumulate crap (U.S. machines run hotter with more water changes, explaining why this is possible). Otherwise - you do have to clean filters sometimes, depending how dirty your plates are. 

Whilst our one is just a regular, its seen three years of near-daily service without a hitch - bar those drain filters, which are a crap design, IMO. 

I wouldn't expect the tall models to be any different, except for size. 

The F&P pump design is very robust, and very simple. It actually moves a TON of water, considering it only uses about 0.59 Gallons every fill. Machines using double this should easily accomplish such spray - but due to the amount of pipework and size of it, they often don't. The DishDrawer's pump uses the Spray-Arm as the pump-head to generate pressure. 

There is no spray from the top or sides - instead, one's loading should account for this to allow a "Constant Rinse" action. Otherwise, you might have towel off the tops of glasses afterwards in return. 

I found the cleaning to be very comprehensive, when loaded correctly. The only issue was tall/thin items in the corners of the rack. Load up with wider items, and there is no issue (I always let the tall glasses sit on the edges, since our mugs inhibit the loading of other stuff in the racks. Its never a chore to remove crap from one glass, anyway). 

The video was produced by member "Dadoes" and effectively displays the spraying power. Since there aren't any dishes, the soap gets a bit frothy at the end, inhibiting the wash. But you get the idea.