Habitat Dark Birch frame, experiences?  

I don't know anything about the quality of Habitat stuff in general, but I've done a lot of picture framing. I've used a lot of inexpensive stock frames and have never had any problems with them even with bigger art. In the US, a 60 x 80 cm (25 x 36 in) is considered a poster frame and is usually sold with plexiglass instead of glass, because glass in that size is pretty heavy. That would be the only consideration, I guess. You have to be more careful about cleaning plexiglass than you do glass, because it scratches so easily.

Just make sure the mat board or foamcore under the art is the right dimension for the frame--you need to leave a few millimeters of space for expansion during humid weather. Backing that is cut exactly to fit can exert stress on the frame joints when it expands even a little bit.

That's a tough size to find of good quality in a thrift store, but it turns up eventually. I like to use binder clips hung on nails for larger size 2d art objects-- which keeps it simple, attractive, and accessible.

Here's one I just framed, spray-painted 20 x 20 (51 x 51) solid-wood thrift store frame, foam board and red poster board from the dollar store.. total cost for framing of two prints: $19.07

I usually buy Habitat frames (not your model though) and they are pretty good for the price. Solid and looking good.

Thanks all for your insights!

I was at Lille, France friday and saw these in the local habitat shop.

They are in (be it thin) glass though, Spanky!