I still have my old MotoGP roo suit. I loved that thing even though I don't really wear it anymore and just keep it around for a backup. To this day its still the lightest weight suit I've ever had.
I had 2 Teknic Roo suits and they both held up really good. The one had more crashes then I would like to admit in it. Alexa fixed it twice and always worked great. I prefer Roo over cow now. It is lighterm seems easier to move in and is as durable.
I have a custom Speed & Strength roo suit. The roo leather does not feel thin and the suit feels kinda hefty to me. Not quite as heavy as a Vanson or Syed, but definitely not light. Not that I want to find out, but I get the feeling it would take several trips on the asphalt before it's unusable.