I really wanted to like this unique speaker, but from the word go, it never went well.
I first tried it on our living room coffee table, it's intended home. It sounded boxy and hollow, and I mean really boxy and hollow - very disappointed. This was in the middle of the table, as I moved it nearer and nearer to a corner, the sound improved, and by 120mm from the corner, was not too bad - but quiet. It got quieter the better the sound improved everywhere I tried it. And this is the crux of the fault of the product
Nearer the middle of a surface, a surface is it's most compliant, weaker if you wish, and it must vibrate it easier, and always was louder, but always boxy - often painfully so. As the sound improved, by moving to the stiffer edges or corners, it didn't have enough power to vibrate it hard enough to go loud enough even though the sound improved.
The 2 best results were:
On a 4 seater thick pine dining table, right in the middle.
Second best was the kitchen worktop, but it was woefully quiet. This speaker, when it sounded even reasonable, and this is the best it ever sounded, but was never loud enough to be engaging.
Other big issue, was terrible battery life at any sensible volume.
It has great potential, but this speaker can only be considered a prototype. A good version, would be twice the power with a big enough battery to last a bit longer, could still be quite compact I would guess.
I finally replace it with the fantastic, but more expensive Philips shoqbox 7300 (£170) which enamoured me that much, I also bought an end of line Logitech Mini Boombox (£40) for ultimate portability - and you know what? it's at least as good as the Cisor at it's best, longer battery life. louder (loud enough), and cheaper.