I've stayed in capsule-type hotels in other countries (this was my first visit by this hotel operator) and while I am not a huge fan of the concept, I find the experience tolerable for a few days with two minimum requirements that this property completely lacked: Acoustics and Ventilation.
When I checked in, I was told that the hotel was located over a night club and that if I found the music problematic, I would be given an entry ticket to the club and a drink coupon for wine or beer. The primary purpose of a hotel is to sleep and the intermittent noise (ranging from barely tolerable to completely unbearable) started around 11pm until around 2 am would wake me up every time I started to fall asleep negatively impacting my circadian rhythm and mood the next day.
What was more unacceptable than the noise was the complete lack of adequate fresh air and temperature control in the pod; I adjusted the control to around 18-degrees Celsius with high volume air, but I felt like I was locked in a death chamber and woke up several times throughout the night to open the door just to get fresh cool air (the corridor was about 10-degrees cooler than the capsule).
This was, by far, the worst experience I have at any hotel in any of my global travels. Not only would I never stay at this hotel, I will never stay at another Brown property.