In-home pull-up bar... easiest way?

[jrblack]

I considered this thing: www.studbarpullup.com/product/stud-bar/

Anyone have any experience with it?  My problem is that I don't have level ceilings: they all run at an angle.

Here's a wall-mounted bar made of piping: diyprojects.com/bombproof-pullup-bar-fitness/

What have you guys done for home bars?

[MarkAnderson]

Gymnastic rings.

[dsm]

I second rings. They're great to have as you can use them for more a lot more than pullups unlike a bar generally (depends on location of the bar I guess). I use them for all kinds of bodyweight exercises. Also they are easy to install/adjust. In my home, I was able to just slide the straps through my attic crawl space door, and used an extra piece of wood for support. No other work needed.

Before I got the rings, I was doing pullups on my hangboard jugs, which I use a "blank slate" to hang in a doorway.