the mill lock on is great for long days. I've never been one to be able to sit for long periods, but i purchased one last year and it was great for comfort and stability, plus having the added bonus of being able to pack the stand out when you leave (for those with theft worries). I have the one stand and three receivers now. The good thing about the mill. is that your price per stand decreases per locations, because all you need to buy is another receiver bracket and a set of sticks/steps.