Don mills is the eastern stop on line 4. The biggest perk to this station is that it is connected to Fairview but that about it.
The station itself doesn't have much washrooms and small shop. It's a three teir station. Subway then main concourse then bus buy. There is an entrance by the fairview side but sometimes that is only an automatic entrance if it's not staffed. And other entrance by Sheppard is a bit of walk. Mostly through fairview parking lot.
The station itself is usually clean but it a bit of treck between the busses and trains.