I first came across Presentii on Product Hunt. I tried their product 1 month after I got to know about them in an internal team presentation and totally loved how you can receive feedback at every step and make sure your audience is attentive too. Review collected by and hosted on G2.com.

The only trouble I faced was in integrating videos into the presentation. It slows it down a bit and also causes some trouble with the loading time. Review collected by and hosted on G2.com.