Michela is really kind and nice lady which was there at our check-in time and explained everything to us. The BnB which is really bed and and "breakfast" is located quite near to biennale. we just had to walk 10-15 minutes to reach Arsenale and Giardini. The apartment was quite big, clean and comfy. Enjoyed our stay.
P.S : Also you have the opportunity to leave your luagage at the storage after your check out. This is quite useful specially in Venezia.