Used these packing cubes over Christmas and they worked perfectly to organise my clothes. If you are wanting to use the compression feature then I would suggest not filling the cube to capacity as they become difficult to zip up. I had a big bag and mainly used the cubes for organisation. I could fit all my jeans and shorts in the larger bag, and t-shirts and shirts in the smaller bag.
Quality - Looks good so far. Doesn't seem like it will break. Convenience - Packing cubes are a must for travel Compression - Seems like a gimmick. The edges zip up but the height of the cube itself stays the same. Compression looks like it's limited to the outer 10% of the cube. A nice to have but that brings me to the next point. Value - I got these for the equivalent of $30 off and even at this price I feel they are only just passable for what they do over a standard packing cube. May as well go the cheaper tried and true method.