It is commonly used in Finland - almost every dropzone has Student wings in use - SL, IAD and AFF. All versions have been just working remarkably well. I believe Student Wings beat easily all the other student rigs - they are comfortable to use, give the student a good freedom of movement, are safe (especially as an instructor and S&TA I give a great value to Wings Reserve pilote chute - it has the best drag available and gives the reserve unbelievably fast and secure deployment even in a slow speed deployments)
I recommend this piece of equipment to all responsible DZ's to use.
OoPee
S&TA, SL/IAD instructor, Tandem I/Examiner
"Have fun - be safe!"