So let's get this out of the way: I didn't know this was a 'love hotel' when I booked it! If you don't know what that is, look it up...
However, don't let that turn you off from staying here! The hotel and it's staff were excellent. The rooms are clean and well-kept, and they have plenty of amenities to keep you comfortable. It's very close to the bustling nightlife of Shinjuku/Kabukicho, making it easy to get back to after a long night out.
The only thing missing for me was a closet in the room to throw your clothes/luggage in, but that's probably only an issue if you're staying for several nights. Other than that, we really enjoyed it.