What this hotel has going for it is the price and location and that's just about it, where you must bring a pair of earplugs if you are staying.
It is in dire need of a thorough makeover, especially the windows that are so old and of such a poor quality, that you can hear everything going on at street level, including the sound givers by the traffic lights for the seeing impaired. Add to that the constant rattling if there is just a bit of wind and then imagine the horror concert you are in for if there is a minor storm going on, which my companion and I experienced in each of us' rooms. It was so bad that I had to use one of the towels to try and keep the window in place in my room, to try and keep it from keeping me up all night.
And if it wasn't the windows, then between the rooms are flimsy (locked) doors through which you can hear most of what is going on in the adjacent rooms plus the water pipes that run through the rooms from top to bottom also make noise when used on the other floors.
The shared toilets and bathrooms should therefore be the least of your worries if you choose to stay at this hotel, but having been subject to the concert of horrors for multiple nights it does want to make you contemplate to just go in the sink...
Whomever has given this hotel 3 stars here on Google must either not have stayed here overnight or been so inebriated that nothing could wake this person up.
2 stars is therefore all I can give it.