A lot of people are new to the idea of the aparthotel, but they are becoming increasingly common. They are what the term seems to suggest - a combination of hotel and an apartment. You can book and stay in the way you would a hotel, or you can arrange to live there long-term and be charged at lower rates.
I chose the Royal Bee Aparthotel for an overnight stay, after arriving on an international flight at the nearby Don Mueang airport in Bangkok.
However, you don't get a kettle, so that can be a drawback. There is a 7-eleven directly opposite the aparthotel so this helps make up for the lack of kettle as you can get instant coffees there. Also handy for picking up frozen meals (they do heat it up for you), snacks and toiletries.
It is hard to find completely quiet places to stay in Bangkok, in light of the bustling and busy place it is. Yet I had no complaints at the Royal Bee Aparthotel.
On the same note, the room that I booked had a window. This is great, because it let in natural light and a breeze. Windows in hotels is not a given in Thailand, so this is a definite point in this place's favour.
Check-in was simple, as was check-out, and the receptionist was happy to arrange a taxi for me on the spot. A deposit of 500 baht is required at check-in, but this is refunded to you when you return your key.