I bought a set some time ago, a bottle cage, a tool roll and the zip up bag plus some extra mounts.
I have used the tool roll daily, mainly because it is easy to swap between bikes.
The zip bag I have used probably only two or three times.
The bottle cage is good for non standard sized bottles but I haven't found it very secure and it has bounced off once or twice. I may be using it wrong but to make the bottle secure you have to velcro it in tightly an then remove the bottle and cage together to drink, it can then be awkward to replace on the move.
I wouldn't rule it out though as it is convenient for odd bottles, I have used it successfully with a trangia fuel bottle.