I think these look awesome, and they feel pretty good too. Beautiful colours, and very comfortable. It has a good amount of bounce in the heel which is what the Ultra Boost is all about, while being firmer in the front. The arch support is very good.
The uncaged bit refers to what Adidas call Primeknit which is the material that covers your foot, which cleverly constrains your foot without gripping it too tightly. The little sock topping also helps to hold your foot, but it does require a small amount of manoeuvring to get your foot in. The laces are more for show than anything more practical. Once you have have them tied up, they stay that way. Your foot goes in and out without having to do any relacing.
Adidas make a lot of their shoes in limited editions, which this colour is, and this particular colour is sadly not, as far as I can see, available any more. Actually, as of the time of writing, Adidas has it in size 13.5 only, which rather limits the number of potential customers, but other, rather nondescript colours are more readily available.