N Reg
The QueDiem website is a bit misleading because it doesn't appear to mention the first product they produced which is the package specifically for flying schools.
The school I work in has been using the P-C based system for around 6 years now and we find it more than suitable for the job -does everything you are looking for and can be regularly modified to suit your own specific needs.
Can't recommend it highly enough! PM for further details if you like.