I can even clean in my shrimp basin bottlenecks so because the suction tube is very narrow. Thus, it is suitable in my opinion ideal for nano tanks, as it can already guess the name of the product. In a larger aquarium you will therefore probably not be more happy.
Toll I find the supplied hose mount, something should be included in any gravel cleaner. They attached it to the hose and bucket, and then can fully concentrate on cleaning the aquarium, and does not have to hold with one arm the hose.
The cleaning itself is relatively simple. Rinse take everything apart and put back together after drying.
As it seems to me, is the version used by me but even to the new pump, as of "EB" uploaded image to see.
The only really justified criticism is in my opinion the hose clamp / flow controller, this works, but rather binary manner. Either complete flow, or even very low flow rate, can not be completely interrupt the flow of water in order, and not really adjust. But to reduce it's useful.
To interrupt the flow of water I have worried from the Gardena Micro-Drip range a stopcock at the hardware store and this integrated into the hose line.
In my opinion, a worthwhile investment. Would it still possible the whole thing a little less space to store, it would be 5 stars from me.