I got this case for an AC1S Fusion 5 tablet, which fits it nicely and gives whilst it does give some protection, I have a few problems with it.
Firstly, this case is potentially dangerous and can potentially cause damage, because the tablet often fell out of the case (even when catch is closed) if held the wrong way up when carrying. This may be due to just being a heavy tablet but I would have thought that AC1S would have kept that in mind as made appropriate design changes - it is advertised as an ideal case for the Fusion5 after all. If the tablet falls out all the time what use is the case?
Another thing to mention is that the keyboard is in fact not a standard UK keyboard, notably there is no option for a £ sign and is instead replaced with the American $ sign instead. Whilst this is no big deal it does get frustrating when you can't even type your own currency!
Lastly, the keyboard in this case is placed right at the front end of the case, meaning it becomes difficult to actually type and tended to cramp my hands when used on the lap. It does work well on a desk or flat surface, but as I like to use the tablet when seated on a sofa for instance, this case does not work well.
Now thinking positively, typing is fairly pleasant and the keys feel fairly responsive and have a nice spring. The quality of the material feels good and authentic (despite the issue with it falling out). I also had no problems setting up using the keyboard whatsoever, it was simply plug in and play through USB.
Another thing to mention is that it connects using a standard USB slot, so a mini USB adapter might be needed for other tablets that to not feature normal USB.
If you can put up with the faults then I have pointed out in this review, this keyboard case is suitable, but it is nothing more than that.