Cons: No bass
Treble peaks - sibliance
Response far from flat
Bought them for $47 for my mobile believing the measurements used for full sized cans will have the same indication to real performance but found out the hard way the measurement don't apply the same way for IEM's - see this thread.
They aren't that much better than any Chinese $15 IEM. There are no free meals and to get quality looks like you'll have to be ready to part with $100 or more.