Really a unique experience, sleeping in a true Soviet Union bunker. The history aspect and the bunker is fascinating and incredibly well-preserved, Highly recommend for an authentic adventurous experience. However, just know that you’ll likely not get a great night’s sleep. Any sounds made echo throughout the entire corridor all night (in our case, it was four young guys who’d been out drinking till late). Also, the entire bunker - including the bedroom - is cold as a fridge (of course, it’s underground!), though the provided sleeping bags kept us warm. The bedroom door has a window that overlooks the corridor, so also not much privacy, and you get the light from the corridor, but we managed to hang a towel over it, which helped. Bathrooms are shared but clean - in fact everything was very clean, so that’s a big plus. Cool T-shirts too. In short: We are tired but glad we experienced this.