The HPRC 2550 closely competes with the very well-known Pelican 1510 as hard cases fitting within the standard carry-on dimension. And while Pelican may be the most well known, the HPRC actually has a bit more interior room because the handle is built into the exterior. Whether that one inch of extra depth makes a difference depends largely on what you want to carry, but the HPRC is a notable contender. Besides the extra depth, the HPRC's handle design is easier to lock and unlock with one hand, where the Pelican requires two.
While the HPRC is a case that will keep your gear protected from the elements, some consumers who have owned cases from both HPRC and Pelican have noted that the Pelican has a bit higher quality standard. Like any hard case, the HPRC 2550 is tough to transport over uneven ground. But, the HPRC offers more interior space, a sturdy handle and is a worthwhile contender in the hard case category.