I had a very comfortable, clean and convenient unit close to Warsaw HUB, where I was visiting colleagues for a work trip. Everything worked well the unit had laundry and a little kitchen, etc. The only challenging bit is the check in. You will not find any normal sort of hotel lobby at the address listed for this business, you need to text them to get instructions on where to find the check in office and how to get in. Fortunately they are quick to respond once you text (or WhatsApp) them and are fine communicating in English.