Bests & Worsts Reviews from Amazon

This is the third set of bluetooth headphones I've owned, and the second best out of the three. The first pair I purchased was a Motorola HT820, which I still use occasionally to this day. I'd use them more, but they have a mini-USB charging port as opposed to a micro-USB, which makes charging a hassle since I need to swap USB cables. The second pair I purchased were the LG Electronics Tone+ HBS-730, which confusingly gets good reviews despite being a half-baked product. $50 down the drain. I had high hopes for the 66 Audio headphones, and they mostly deliver with some caveats. First and foremost, they sound great for bluetooth headphones. I have a background in sound engineering, so you can trust me on that front. Just don't expect them to compete with your Beyer Dynamic headphones :) Clarity, treble and bass levels are all acceptable. Since these are on-ear headphones, there is not a tight seal and you will lose bass response. If bass response is very important to you, seek out an over-the-ear set or earbuds. They paired easily and uneventfully, range is acceptable if you walk away from your source - the standard 20-30 feet. However, the neckband could be a bit larger for my huge melon. The over-the-ear loop puts some mildly uncomfortable rearward pressure on my ears. This is not pain, just some mild discomfort. It should be quite tolerable for an hour or two, but I'd rather not endure it. I had no such issues with the venerable Motorolas. Here's the primary reason for the average score: The giant, noisy buttons. Every push of the enormous, clunky buttons results in an ear-piercing "thwack thwack". Imagine taking a Pop-O-Matic Bubble and putting it flush against your ear and "popping" it for each incremental volume change or track skip. Now, I can avoid ear pain by putting my thumb underneath the earpiece and pulling it gently away from my ear while pressing the buttons. A workable solution, but not even close to optimal. The Motorolas have tiny buttons at the edge of the earpiece that make nary a sound, and were a delight to use. I have not yet had the chance to use them with a phone call, so I can't comment on microphone quality. To sum up, add an ever so slightly larger neckband and re-engineer the control buttons, and this is a 5-star product. But 3 out of 5 ain't bad, and I will definitely use these over the abominable LG earbuds. Update 8/22/14: 66 Audio was gracious enough to send out a replacement set of headphones due to a potential button rattle problem. Their amazing customer support initiated contact with me within days after my original review, and offered to send a replacement, completely free of charge. Since then, I've used these nearly every day, and I remain pleased with them. While I still think the buttons need a redesign, these have proven very sturdy and dependable. I really like the product and have grown quite comfortable with them over the past few months, and still admire the sound quality from this over the ear design. They are comfortable enough to wear for long periods without discomfort, and apply just enough pressure to your ears to deliver decent sound while being unobtrusive to the outer ear. I've only used them for a phone call twice, but there were absolutely no quality issues with the conversation on either side. I've bumped the rating up to 4 stars as a result. Unbelievable customer service, and I look forward to their future products. Thanks!