I may be wrong, but I think that Suntana actually use the same trainers as WOW factor for their training courses.
I'm sure someone else on here will be able to confirm, but I'm pretty sure I saw a post a while ago that suggested this.
WOW factor training is very good, I trained with them and it was really great plus the after care service is fantastic, you can contact the trainers anytime after your training should you have any questions or if you're not sure about something. I came away from 1 day of training confident enough to start spraying paying clients pretty much straight away (after spraying 1 or 2 friends that is just to be sure of my technique!)