The space is immense, and not only because the TARDIS is bigger on the inside than it appears on the outside (literally). Todd Pineapple Span spent 2 years and 3 months turning his basement into a fanboy's dreamhouse.
There's a Next Generation-era corridor that connects to a transporter room and a starship bridge. Sound effects activate automatically or with the tap of a touchscreen. Several functions operate through voice commands. The mechanical and visual effects of TARDIS activation are especially impressive. It's an astonishing work of inspired design and detailed craftsmanship.