Worth the money!
I've been painting plein air for fifteen years or more.  I've used this type of case for at least ten. The 12 x 16 is the most versatile size, holding 9 x 12, 12 x 16, or 8 x 16 panels.  I love them, slip four panels in and off you go. Unless you just really want wet paintings rubbing together, I would not put more than four in a case.  You can, in the 12 by 16 case, put 8 x 16 panels stacked into one slot.  Word of warning: the holders that separate the panels are glued in, and leaving the case in a very hot car can make the glue fail.  It can be fixed with E-6000 glue.  Be sure to put your name on the outside, because everyone who paints outside seems to have one of these!
Rating: 5 stars