Electronics Engineer/Manufacturing Professional for 3 decades give or take. I was summoned by a head hunter once to an Asian manufacturing plant for a possible job. I stood at the end of their production line and watched a bunch of guys with stopwatches making this line as efficient as possible, this includes quality inspections and testing.
One thing I have learned with quality and testing, you don't rush it or your field failures go through the roof!
Enter a refurb, this equipment went out and was used for a while, failed (NO surprise there!), went back and more then likely was worked over by a tech here in the states/Canada/ the EU that took his time found the problem and did a proper alignment of the phone in a less rushed environment and fixed everything else he could find wrong with it too!
The life of most electronics components is at least 100,000 hours of service, minimum. Comparing that to a used car is a bad comparison(no disrespect intended). I will take a piece of refurbished Asian manufactured equipment to a new one any day!
My Wife has the original Capitivate, I cheaped out and purchased that phone at least 2 years ago if not 3, for me, it was REFURBISHED when I bought it, she made the mistake of selecting a Palm phone instead of a Android and after using mine for a while one weekend on a trip, she kind decided it was hers, now that phone has 2+ years on it and is just being replaced because I got a Skyrocket, so it must be better then the Capitivate because I have one(she got her new Skyrocket yesterday). The only problem I can see with her refurbished Capitivate, it needs a new battery and is 3G only. Still works perfect, now your thinking a Chick has been cruising this phone for 2 1/2 years so it has had and easy life. That Chick is A Deputy Sheriff in Southern California, her equipment takes a butt whoopin, I know because I maintain her stuff!(her sidearm looks like it has been through 3 wars)
I work more in a suit and tie environment, My Skyrocket failed after 6 months, no data transfer, never been dropped, always in a holster on my belt, never left in the car to bake, no reason for it to fail caused by me. I just got my refurb a month ago, it actually sounds better then the brand new on.(I actually take a good old fashioned RAZR when "field work" is required on my part, I have a drawer full of 2G and 3G RAZRs)
If the equipment is getting up there in age, stay far away from refurbs, the 100,000 hour rule applies, a year or two old, ENJOY! It proabally wont fail again for a long while! But there are always exceptions to EVERY rule, a lemon is usually just that, but rare in Electronics.
Enjoy your replacement, me thinks you will find it every bit as good as a new one!