I like that it's very easy to use,it works well with my food database which i have created in excel for this purpose so there are no issues of compatibility or anything else really! It can be used by anyone who has basic computer skills (which most people do these days) but if you don't know how computers work then maybe get someone more technical help as not everyone knows what they're doing when using something new/different etc..
If your looking at getting into nutrition calculations online - look elsewhere because nutrical pro doesn;t offer any extra benefits over other programs out their such as fitday /myfitnesspal ect...