The sound isolation is very strong and will suffice for any potential buyers. If you need something stronger, you need to get industrial-grade proofing.
Their sound quality is as good as 90% of people will ever need from their in-ears. The sound signature slightly favours vocals and is overall something I would consider quite flat.
These are good for relaxing&listening as well as during sports, like cycling or running. They especially benefit cyclists and runners in windy conditions due to their design that sits nearly flush in your outer ear, resulting in much reduced wind noise.
Comfort was slightly suspect at the beginning, but I'm now adjusted to them after a few weeks of listening. Comfort is no longer an issue, even when sleeping.
The quality of the casing and cables is very high. The cable especially seems like it will withstand many years in regular use. From the connector to cable sleeving, the y-split, and the thumbnail-sized restrictor after the y-split. It all feels substantial and strong.
I wouldn't call these heavier than other in-ears, but they probably weigh more than the 30eur Apple earbuds. Don't worry, though. The weight is not an issue, especially with the behind-ear design.
