I have used the "Apache" cases from Harbor Freight (with the 'plastic dip' spray trick on the foam) for several years with zero issues.
They have flown all around the nation from mega-airports to bush plane, canoed, kayaked, 4x4ed & ATVed, been bumped, dumped, rained on & sea sprayed along with covered in dirt, mud & dust at various times & combinations and everything inside was kept dry, clean & protected.
Harbor Freight just had a 1/2 off sale on Monday and from my experience, I purchased another pair of cases for both my Son & Son-In-Law.
For the "use & value received to money paid" equation, they are hard to beat.