I used these commercially on the Colorado. Yes these are fairly heavy but pretty solid. When I saw people bend these is was usually a high force and something dumb like hitting a rock on spare oar etc. As long as the shaft didn't buckle you can usually straighten them out just fine. These flex quite a bit. The handle stays grippy when wet but may be a little big for people with smaller hands. I have not used other oars more than a few hours so I can't compare them but it seems like these are great for anyone on a budget with young arms and joints.
These are cheap and will take a lot of abuse, but are probably the worst feeling oars on the market. Cataract oars aren't all that much more money and are worlds better, without the hassles of wood oars.