I have a 3.8 and a 5.4, both on handles. I find them easy to buggy and board with. As mentioned earlier, there is hardly any lift produced by these so you do have a chance at staying in the buggy, unlike with my blade 4.9 . Quality is excellent. I would recommend them for ease of use and stability, but probably not if you want to race and definitely not for jumping/ more extreme activities.
Mick