I had a quick play with them and they are fantastic. Shows the power of the system.
My only complaint, and it is minor, would be they are only a starting point and design changes are needed.
For example, the lightbox model box needs to be larger on desktop and the margins are too large on mobile devices. Also, the slideshow height is a set px and won’t scale down on smaller screens, the thumbnails are not responsive and drop below the screen due to excessive padding.
Other than the lack of slideshow responsiveness, these may just be personal design preferences, and they are easy to fix in the settings.
As I said above, I LOVE THEM and they are infinitely better than most could do. But they are just a starting point.