[Nexus 4 Accessories] urinsane:
I had the HBS-700 for about a year, loved it, used it almost every day at work, anywhere from 1-6 hours per day. Used it for working out. I didn't baby it one bit, and it was still going strong when I lost it. This was when I had a Galaxy Nexus.

I suffered for about a month before I finally broke down and replaced with the HBS-730 in early January. I can report that I don't have many connectivity issues as reported on the Amazon reviews, so perhaps the Nexus 4 just works better than some phones. I can still get nearly 30 feet away before it starts to break up... usually. The odd thing is that the sound will occasionally break up while I'm out for a run or other times when the phone is less than a body length away. This did happen on occassion with the HBS-700 and Galaxy Nexus, but seems to be slightly more with the 730. Not apples to apples, but I can say that it isn't enough to bother me, and the distortion only lasts a second or so before going back to normal. I think iPhones have some serious issues with this set but so far my Nexus 4 is all good.

Last week, my boss found my old HBS-700 behind a filing cabinet. How it got there I have no idea. I tested it for a night before selling it to another coworker, and did find that the 730 has better sound quality (or I should say, a sound quality that I prefer). As someone else mentioned, the bass will sometimes distort at high volumes, but you can turn off the bass boost which is on by default. There are three EQ settings (Bass boost/ Normal/ Treble Boost). Default is Bass boost. To change, press both + and - volume buttons and you'll hear a beep to confirm (first beep = Normal, 2nd = Treble, 3rd brings you back to Bass Boost...) You have to do this each time you turn on the headset, but I find the default bass boost is fine for most songs and will only change the EQ if I am getting distortion. (edit: to clarify, only the 730 has the EQ feature, the 700 only has one setting but I did not have any bass distortion issues)

I've had both models yanked off my neck by just the thin earbud cord several times, hard enough to the point I was sure something would break. I've sweated all over them. I've taken them to the beach. The only issue I have ever had was losing one of the small plastic clips that let you adjust the amount of cord between the set and the earbud on my set of 700's, and those aren't really even needed. Oh yeah, and even after a year of good use, I don't think I ever managed to use a fully charged battery in a single day with my 700's. Like the OP said, the battery on these things is great.

I purchased the 700's for my sister and for her boyfriend last year for Christmas. They are converts now as well.

So yeah, I love both models, recommend them both, but after listening to both side by side, I would have to recommend the 730 for the higher sound quality. Buy from Amazon so you can return if you have issues with the connection, but I think you will likely be pleased either way.

OH YEAH!! HOW DID YOU FORGET TO MENTION THE VIBRATION?! :) The neckpiece vibrates on incoming calls, so even if you have the earbuds stored in the headset and phone on silent you get your notifications. So simple, but so useful.