Confused about which guest house to use.

I need an apartment for 5 weeks near shinjuku. I've found a few different companies like sakura house, fontana, ichii, takumi, etc.

What I wanna know is - from people who've stayed there - what's good, what's bad about these?

Little info about me :
Staying for 5 weeks.
Need something furnished.
Need something no further then 40 minute train ride from shinjuku.
Looking for something less than 140,000 TOTAL ( counting utilities, internet, cleaning fees, insurance fees and whatever else these companies charge ).
Preferably clean ( hate bugs ).
Speak very little japanese so need a company that's hospitable to foreigners and doesn't scam them.


Thanks for any help!

I know many foreign friends who stay in BORDERLESS HOUSE.
They all said that not only house it self but also people living there are also very nice! I don't know the details, but they say most of other guesthouses are dirty...

I think this might be out of your price range but thought I'd share it anyway.

http://www.tokyoapartment.mwerk.org/

It's a private (not shared) furnished apartment about 2kms from Shinjuku, or a couple of train stations away.

The owner is really helpful and speaks English.