I've now spent several months in The Senate and I've been quite happy throughout my stay. As said, this is not the most luxurious hotel option but really resembles more of a service apartment -style living. Rooms are very spacious and kitchen well-equipped, the premises and rooms alrea always clean, and especially with longer stays it's good value for your money as you can have very "homey" living (do remember to bargain the price, of course). And Diamond District block is also equipped with nice courtyard + swimming pool (in renovation since July 2010). Decorations are somewhat basic but still appealing to the eye. Only negative is that I wish they had better showers, the showerheads just tinkle all over without good pressure.
If you are not looking for ultimate luxury (like Leela, Windsor etc), I would definitely recommend for longer stays and why not for brief ones as well!More