45, Jalan 3/108C, Taman Sg. Besi, Kuala Lumpur 57100, Malaysia
We stayed here for four nights. We used to live right behind the complex, so the area was very familiar to us. The Nest is very conveniently located within Bukit Bintang. You can walk to the huge shopping malls within 5 minutes. The pedestrian walkway that connects KLCC and Bukit Bintang is also only a 5 minute walk. Changkat Bukit Bintang is a popular nightlife area, it's right behind The Nest though you will not notice anything about it (it's a quiet side street).
The rooms are basic but contain everything needed. It's not a cheap backpackers place, but it does attract backpackers and travelers with a bit of a budget. There's no pool, but not many (besides families with kids) might need that during a stay in a vibrant city like KL.
Cheapest rooms are usually available for around RM100 per night, which is a steal for this location.
Beds were fine. Aircon was nice too. No tv, but not needed. No minibar, but a fridge where you can put some stuff into. Next to the guesthouse are quite a few small convenient stores, and you have many hundreds of restaurants within walking distance.
I'd definitely recommend a stay at The Nest next time you are visiting KL. It's no 5* hotel, but it's a great place to really explore the city.