Table 1.

Percentage of adolescents who answered that they strongly agree or agree with claims about NettOpp and Opp’s system usability.

	Opp (n=27), n (%)	NettOpp (n=15), n (%)
I think I would like to use this product frequently	9 (33)	5 (33)
I found the product unnecessarily complex	1 (4)	0 (0)
I thought the product was easy to use	25 (93)	13 (87)
I think that I would need the support of a technical person to be able to use this product	0 (0)	0 (0)
I found the various functions in the product were well integrated	22 (82)	14 (93)
I thought there was too much inconsistency in this product	0 (0)	0 (0)
I imagine that most people would learn to use this product very quickly	26 (96)	15 (100)
I found the product very awkward to use	2 (7)	0 (0)
I felt very confident using the product	19 (70)	11 (73)
I needed to learn a lot of things before I could get going with this product	1 (4)	1 (7)