I bought these primarily for the ANC as I fly a lot for work. For the price they are very good for NC on the plane - they are able to remove almost all low frequency sounds. They struggle a bit with the higher frequencies (e.g. voices) but I actually prefer that. For office use they are good although battery life won't last a full day with ANC, you will need to recharge at some point.
Sound quality is good enough although I haven't bothered to compare. The case is small and light - perfect for travel. They sit in my ear well Hear-through mode is not very good but I never use it anyway.
For the price it's hard not to be impressed with the ANC, sound quality and overall product.
If you want decent hear-through then look else where.