Crisp, clear, full of base. Once I figured out how to keep them in my ears, moved rating up to 5 stars for exceptional performance.

highly recommended, exceeded expectation!

So remember these aren't meant to be compared to high end products.
Having said that, they sound great. Slightly limited in just a couple of ways.
1. no memory wire - if you've never had a pair with memory wire you probably don't know what you're missing. For keeping your in ears in place it's really handy, and would really put these in another category up the quality ladder
2. the cable. It's flimsy, and braided. If these came with a silicon sleaved cable and (like other monoprice in ears) a second cable with a mic, these would be at the top of my list.

Other than this, you really can't beat these for the price. I would stack them up agaist name brand versions on sound, but with anything monoprice, build quality is where the cost savings come in.

Highly recommend!

I bought there to replace a similar product by Shure, which cost 3-4 times as much. The mids and highs are crisp and clear, but where these fall down is in the low end. There is plenty of low end, but it is very "boomy". Bose products are traditionally boomy in the low end, which I don't mind, but it is even more pronounced in these. I bought these for listening to on motorcycle rides, and I think they will be great for that purpose. They block outside noise and are very comfortable. However, I wouldn't consider these for "critical listening", they would become fatiguing after a while. I purchased them at 50% off, which is a more than fair price. At full price, I would shell out the extra money and pay twice as much for an equivalent Shure product.

One note for Monoprice: Really spiffy packaging is nice, but I'd rather money go into products. The whole "unboxing" experience doesn't mean much to me.

I caught these little wonders on sale for $34.99 and, having had good luck with other monoprice audio products, I scooped up a pair on a whim. The Trios present a well balanced sound, with nuance and detail throughout their sonic range. Like most IEMs the soundstage isn't the most expansive, but it isn't non-existent like with many others at this price and thus, the sound placement and imaging is surprisingly present in the virtual audio performance they render with quality that bests many IEMs of greater price and brand name renown. When compared with many of the chi-fi offerings from the likes of KZ and CCA, they out perform the vast majority save only a few specific standouts. To sum up my thoughts, these would be a solid purchase at twice the price and i am simply thrilled with the bargain I got them for. Those of you trawlling Amazon for some cheap IEMs trying to sort the few decent options from the garbage, make this easier on yourself and buy these instead. I guarantee you'll be more than satisfied.

My best sounding earbuds ever -- but not near the most expensive. The only question now is how well to they stand up to use. That is the $39 question, because if they break easily and quickly like almost all other earbuds then they are not worth it.

I like these. Good frequency range. Fraction of price of other similar IEMs.
I would prefer foam earpieces for better isolation.