Annoying things about an otherwise nice hotel
On the first night I was awake several times with blinking lights somewhere on the ceiling coming from some thing like a smoke detector or something. Plus they are multiplied in the mirror positioned right next to the door. I'm a light sleeper. I could not sleep well after a transatlantic flight and woke several times and those blinking lights were kinda creepy. Don't think that can be eliminated somehow. Had to get used to.
The overhead shower lacks power. If it were an ordinary shower which you might take off the rack it would be more handy as water pressure is insufficient. So don't expect envigorating nice hot streams of steaming hot water - just a quick wash. 
My usual complaint - complimentary coffee and tea at breakfast were horrible. Did not touch coffee after trying and stuck to tea. Had to use 2 or three bags per cup to get some brew. I also had two, sometimes three muffins! Sorry! On my last morning i noticed a small sign "Please take one muffin per person"! Made me feel really mean! Tried the $19 breakfast once - not worth the price. 
Okay these are just whims. I enjoyed Yotel.