I do think the small size does create several drawbacks, especially in a public institution. This exhibit doesn't really have much space to retreat from the public and also not a real bright spot. In general it doesn't really give much choice to the spider, something that I do find very important especially for animals that are so much in homeostasis with their environment. Larger terraria allow you to create a mixture of lighter and darker spots, several hiding dens to choose from and even some tiny temperature differences. Something that a small exhibit like this one can't provide.