Yumikos apartment was a great, cosy place for our stay in tokyo and made me feel at home at once. It's got all the equipment you need including portable wifi and is located in a fairly quiet neighborhood with good access to trainstations, restaurants and shopping facilities.
Yumiko herself was very helpful when our plane got delayed by a taifun, gave us useful advice and even spend an amusing evening together with us in an Izakaya. This personal touch made our experience in Tokyo very special.