My room was excellent, and was set up like a Japanese apartment, and was bright and clean. It had an in-unit washer/dryer combo, a couch, separate seating and sleeping area, and a nice table. It also has a full kitchen that was well equipped, with utensils, cutting boards, pots, pans, a rice cooker, kettle, microwave, toaster, and fridge. It also has a balcony.
The staff was friendly and helpful, even when I accidentally turned off the hot water (Pro tip: there's a hot water control panel, don't turn it off). They speak fluent English (some are native speakers).
The lobby is fun and anime/video-game themed (fits in well with Akihabara). They have a happy hour for guests on Thursdays, not to mention a super famicom if you feel like knocking out a few levels in between your own adventures.
The location is great, right in the middle of Akihabara, just a minute or two from Suehiro-cho station, and a few blocks from Akihabara station with access to major Tokyo train lines that can easily get you anywhere in the city. There's a ton of shopping, plenty of restaurants, and a grocery store right near the hotel.
And, even though it's fairly close to those major train lines, the inside of the room is very quiet. The hotel was fully booked while I was there and I heard no noise from any of the other guests either.
I stayed for 4 nights, and would have been happy staying for a lot longer.