The "sticking" drawers on the HF (or northern tool) boxes are designed that way. That is their system to keep the drawers closed while moving the box. If you don't push hard on the drawer when you shut it, it will not click into the lock mode and will be easy to open.
If you push on the drawer face until it "clicks" home, it takes a good tug on the drawer to get it to open. Once loaded, they can take a LOT of weight and still run smooth. Like I said in an earlier post, I have a lot of lead in the drawers of mine (I admit they are overloaded) and they are still smooth.
Are they as good as the top line boxes? No... I will not give up my Snap-on box but as a starter box for a young tech or a home box , they are more than enough. The biggest problems for me with these boxes are the depth (only 18" for the 41" boxes) and the locks on the box (not a concern for home use).
Appearance might concern some (crinkle style paint) as they woud prefer slick paint but then again, others prefer the they way these boxes are finished. All in all, they are a great bargain for the money despite them being chicom made and should give you years of service.
As for the rails being easy to service, be aware they you will need to drill out the factory rivet holding them in place (this can be replaced by a screw). Once the holding rivet is drilled out, they pop out of tabbed slots like most rails.