They certainly have enough space per viv and plenty of enrichment, kudo's for that! Are those plants real? This is not what I'd expect to see after being told these are naturalistic vivs but that is just bias I guess because over here we are so used to vivs, especially completely glass ones to show the splendour of its content when people put efforts into it to use real plants
To be honest I'd use Herpteks of that size if I'd have that space just to be able to see the insides through clear glass for optimal enjoyment of the snakes but without the assumed stress of a completely glass viv. I guess these tubs are way cheaper though