One of the best slings I've owned.
It's fantastic.
Until.
You roll it up for travel and it gets undone (and your paper diagrams are gone)
The only draw back (for me) is also a feature.
The increased modularity of the SR3 makes it easy to get the finger loop or the wrist retention loop in the wrong position during travel and using the SR spool.
Forcing you to either try and figure how it was set up, if you mess it up, or wait until someone from Pan/Sling Research gets back to you.
Case in point: this is my "finger loop"
And unlike my other much simpler slings, I don't remember how to return it to shooting position.
Do I: pass the entire sling through the loop?
Do I: slide the wrist keeper down?
I can still sling with this, but it doesn't look like it is in the videos.