There are more "efficient" ways to share pleasure with another girl, but scissoring can be very enjoyable, of course.
Keep in mind that it's very difficult to meet someone and "get it right" the first time. You two have to have a bit of shared experience, until you discover how can it work for both of you.
The angle between your vaginas, the most comfortable position for your legs, the right rhythm, etc. It can also be very tiring if you're not comfortable or don't move well. It can also be tiring anyway if you do it right... but now it'll be for the right reasons.
For me, the context is also very important, and tribadism feels so right in many ways. So if you two feel that way, that will also be a big plus.