You can have a look to this paper: Clinical validation of embryo culture and selection by morphokinetic analysis: a randomized controlled trial of the EmbryoScope (Fert Sterl 2014). In that we published our results, and of course that study has its limitations but probably it will give you an idea, as this is a very well settled lab with constant and good results. I hope it helps.
You may also want to have a look at the Cochrane review on the use of Time-Lapse Systems.
Armstrong, S., Arroll, N., Cree, L. M., Jordan, V., & Farquhar, C. (2015). Time-lapse systems for embryo incubation and assessment in assisted reproduction. The Cochrane Database of Systematic Reviews, 2, CD011320. doi:10.1002/14651858.CD011320.pub2