Here is what I think of the Jaybird Bluebuds X so far!
Battery: Excellent battery length for the minimal body of the headphones. Supposedly they will last 8 hours, but even a couple hours is remarkable considering the earbuds themselves contain the battery. I was very impressed by this.
Fit: I will run with them tomorrow and update this post, but so far I can say that the "normal" fit is quite nice once you get the earpieces set up correctly. The "sport" fit goes in then around and over your ear, which I will try second. So far, so good. I hope it is snug and stays put during a run.
Quality: I was not hoping for outstanding volume or quality from bluetooth headphones this small, but they are very good! I have been spoiled by Bose in years past, but these Jaybirds hold their own ground. I will comment further when I have used them while running.
Pairing: This is one of the easiest and best integrated Bluetooth devices I have used with my iPhone to date. They pair easily, and when you turn them on, they auto-pair again, which is phenomenal!
Use: The standard buttons on the headphones are up/down volume and a "start" button. The center button turns them on, pairs them, and can start, stop, and select next track. This is the standard, but the on/off and pairing function is very well done. The earphones even talk to you to tell you that they are pairing/paired, powering on/off, etc. I am a big fan so far!
Packaging/components: The packaging was hard to get apart. However, it comes with 3 different sizes of earbuds and 3 sizes of the arc fit connections for your ears. It also has a proprietary USB charging cable and a rather small hard case. Very adequate peripherals, in my opinion.
Price: These were on sale at Best Buy for $45 off the normal price of $170. That is a huge discount! I highly recommend these so far, and they are now at a very competitive price point.