To start off, I am not an Audiophile per say, however I do enjoy music and listen to music throughout the entire day, at any time it is reasonably accessible and won't interfere with what I am doing.
Build Quality: Decent, although for a BOSE product I expected the SoundSport to be a little better than what I saw. Gaps in the "L" and "R" section of the cable where it connects to the earpiece, cable is light and appears as if it could easily rip,snag and break, or be torn off if it caught on something.
Sound Quality: This is where I am having the hardest time picking an overall rating. I do not like the sound that these in-ear headphones produce. I’ve used them in conjunction with multiple devices and different equalizers and could not tune or produce a sound I enjoyed.
Highs were so high they may just end up getting arrested for public intoxication.
Lows and bass were unnoticeable, even when cranking equalizers to drown the speakers in a flood of BASS, they fail to produce deep sounds, while simultaneously blowing holes in your ear drum with tiny HIGH pitched sound bullets.
Again, I am not an Audiophile, but come on. This is a BOSE product, a company who we all know used to lead in audio technology, but have failed to keep up with the literal hundreds of brands out there, who produce better, cheaper and cleaner devices. For $100 USD, there are MUCH better options out there. Jaybird is easily, without-a-doubt a much better option for very similar, or even cheaper prices, and they have an amazing Equalizing Application for your smartphone (free) with literally 1,000s of tuned and preset settings.
To finish up, I saved the worst for last. Sound quality is so poor I have to compare them to low end (I’m talking Insignia Store Brand) bluetooth headphones. Actually, that would be insulting Insignia for making a quality product. Do not be fooled by the BOSE name, these are in my opinion just flat out, not good.
I rate these as $15 dollar, gas-station headphones.