The HP backpack has now resolved to me at least the space problem, because even stowed under the seat of the front man I can still squeeze next to my feet (wearing side / belt upwards) and the equipment is still fully there and well protected. But also in the top compartment on the plane can be even easier time a cookie find than with the conventional trolleys.
The build quality is top, because there is absolutely nothing to complain about, and the comfort leaves nothing to be desired. Even brim and bulging like a sausage filled comes to no unpleasant feeling of pressure on the shoulder blade or the kidney area. I for one am thrilled the HP met my needs when it comes to spacious traveling companion in every way. 5 Stars!