I'm getting-on well with my Polaris EVA. We've done a few overseas trips by plane together. It's much lighter than the B+W box and offers more room inside. With an S6L with SON, it's getting on the heavy side. However we're OK on the weight limit such that I can add cycle-shoes, waterproof, bottle cage, bottle and padding for the saddle (which I remove) into the box with space to spare. I use single-sided spds so they need to be spannered off. I zip-tie the zip and have an extra luggage strap to stop the telescopic handle being used as a lifting device.
So far so good.