Three problems with these:

1. They are pretty uncomfortable. Philips only provides one size of a sleeve for the canalphones so they fit some but not all. The earbud was way too large to wear for say more than 30 minutes.

2. Despite being canalphones they don't provide really any isolation whatsoever.

3. The sound quality is overall mediocre. You can give them the benefit of the doubt as they cost $20 but at the same time the Koss KSC75 and JVC Marshmallows sound better. I know the selling point is the "virtual sound" tag on the packaging, but what Philips means by that is a boost in the lower mid-ranges. Really there's not much real bass to the sound, a whole lot of mid-bass thumping into your ears with poor extension and quality. The mids and highs weren't neccessarily bad but were not all that memorable either, and were best noted as washed-out and unrefined but to a save they weren't recessed. The actual soundstage wasn't exactly all that great and imaging was terrible thanks to the aforementioned fake virtual sound.

A few positives: Nice and small, and good for portable use--plus you get a cheap nylon zip-up case to put them in. And they're what, $20? Even cheaper online or on eBay.