Lovely little vac. Operationally indistinguishable from the whole CT11/22/33/44 family. 1200w input, auto operation, variable power/speed etc.
One point to note, however, is that the 11L bags are no longer available for the machine, however I'm told that those for the CT22 - paper, fleece & longlife - will fit fine. The only thing that won't is the removable liquid "bucket" that is sized appropriately for all the larger sizes. Given it's obviously smaller capacity, a CT22 longlife bag & a pair of CT longlife filters would be extremely useful accessories I'd suggest. Nevertheless, I believe the vac is still suited to liquid pickup (still has liquid shutoff sensors), although of less capacity & convenience than the bigger brethren.
I've often thought that the CT11's telescopic suitcase-type transport handle is actually ergonomically superior to the fixed top handle on the rest of the CT range.
I'm also fairly sure that you can also fit one of those rather stupid & fragile accessory CT hose garages to it also if you're desperate for that type of thing. I have one, but personally absolutely hated it on my CT22. Fitted once for a day, & now in permanent storage. Yours for the price of postage if you want.