I have used this for 2yrs and find it a great wee disc for small operators like myself, it does all the adding and subtracting for you on a daily/weekly/monthly basis but i coudnt imagine it working for a muti - car outfit(someone may disagrre with this but just my opinion). Also it loads the info onto a pc and is not stored on the disc, so make sure you keep it on a pc thats kept away from prying eyes
I also print the info out and get my accountant to go over things as per normal when it cums round for that time of year, but its great for keeping info and figures neat and tidy, and at the touch of a button when and as you need it instead of sifting through piles of paperwork again, well worth the £15