I don't want a shrub that grows into a tree??!!

Is this due to pruning?
I will be investing quite a bit of money and the one I like is the Viburnum Odoratissimum (sweet Viburnum) because the nursery man said it produces no berries and will grow about a foot a month if well pampered.
Does anyone have experience with these as privacy fences? I need a full hedge. Thanks.