If you're going to shoot fast and a lot, it is a great upgrade. I got it with my Daniel Defense because that's about all DD offers. Didn't really need it but am glad to have it.
Honestly, the average shooter who doesn't burn out a barrel with high usage can go with a standard button barrel. It really comes down to your intended use and budget.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek