Morroco is awesome!!
Me & my sister have been twice, went once in 06 and again last year. Personally i'd not hang around getting into Morroco, get there as fast as you can & spend as much time in the country as possible, its well worth going for 2 weeks.
Most of the local people are really nice & pretty helpful, some can be a little intimadating if you let them.
Sand is totally wicked to drive, its addictive!
I really really dont see how your girlfriend could not like it out there, infact I dont see how anyone could not like it!