No need to do a GROUP DEMONSTRATION since that is only one and two ball prospects, and I don't want them anyway, right?
the initial order is very rough, so you get basically 19 first visit for just 10 points, i got four 5 Ball player and 5 four ball players with it this draft(that pretty good result but it shows what can happen).
Especially if you draft late or don't have many scouting point i prefer it over the combine. The combine i quite usefull if you have many scouting point and an early pick, since then it is easier to search the best players 18 year old and lot of skill and potential.
PS: i wouldn't invest in second visits(interviews?), for player with less then 4 skill balls. If you draft late, it could be intresting to concentrate first on the one with 4 skill balls, since the chanche is higher that they are still avaible when you draft.