We've just started getting the Konrad SUP Foiling gear in store here and did a little video review/overview of the SUP GLIDR board I've linked below here.
Great little board, haven't got any footage of it on the water yet (GoPro kicked the bucket) but hopefully will be getting some soon.
Was able to get used to the 6'4" pretty quickly, a bit wobbly the first few goes but dialed it in after a couple of stacks! Definitely a lot less stable than the previous board I'd been using, the Naish 140L, but once I got the hang of it I found it more stable on the wave if anything.
Been using it with the Fanatic 2000 setup, haven't tried it winging yet as we haven't had a lot of wind but keen to get out there with it.
Got a 6'8" coming next week too!
Any questions on it ask away. Got a fair few session in on it over the last week... might need to give the 6'0" a shot soon