using for last 7 days facing no issues noise level like a table fansensors are goodif you have two burners or glass top burner always choose 90 cm and 1200 suction powerthere are no free service at allthe installation has been done nxt day of deliverythere is no isue to use plastic pipe which was given in the mountonly one thing is annoying that it took only 10 min to install the whole system and even if you a driil machine any one cann install itbut they charge 700 for that