We spent just over a week at the La'gent, in a moderate queen room. The rooms are compact, however I think it's the price you pay to staying in the middle of Kabukicho. The location is great, with access to multiple metro lines, restaurants and shops. Room was clean and cleaning service was every other day. The beds are quite firm, but I didn't mind that. Sound proofing from the outside is good, but if you're a light sleeper, a pair of ear plugs will help!
Breakfast is great, especially for the price, selection of hot and cold Japanese and Western breakfast foods. All we're very tasty!
The counter of complementary products in the foyer (toothbrush, razors, tea etc.) is a nice touch. Reception staff were friendly and helpful with a good level of English.
Keep in mind check-in is 3pm, so if you're flying in and feeling jet-lagged, it feels like forever!