Really, really nice hotel. Looks low key, and not the typical luxury, but you will appreciate the very clean facilities and rooms. 24 hour open reception with very nice personal. Shuttle service to and from airport appears also to be available 24/7 (fee 25 USD).
Directly to the ocean, where you can enjoy you drink or meal. Nice, clean swimming pool. I will highly recommend it for people on low/middle budget, who seek a comfortable stay in Dar es Salaam.