I have a Marumi 67mm (this one:
Amazon.com: Marumi DHG MC CPL PL (D) 67mm 67 Slim Thin Filter Digital High Grade Japan: Camera & Photo) and I'm happy with it. If that's the one you're looking at, my review is one of the three on there. The construction is nice-metal ring and and actual glass filter. It rotates smoothly, but not loosely. Overall, the physical feel of it is very similar to the B&W grad filter that I have. I've only had it for a few months, but it's seen use about every weekend since then and is still holding strong.
The info claims mine is multicoated, and I've found nothing to dispute that yet. The only time I've seen glare is shooting almost directly into the sun.
From what I've read online, Marumi is a pretty big company in Japan but for some reason doesn't have that big of a footprint here. Depending on what size filter you're after, you're looking at saving up to $60-70. I'd wait to see what others have to say, since I'm just one guy (as Pete likes to say, "BWTHDIK?"), but I'm happy with mine. Good luck!