Smurf is really a pretty easy pull if it is strapped tight and you don't have a sharp edge on the conductor stack.
It is slick inside and the corrigation means you have about half the surface area to create drag.
I know it is seen as an inferior wiring method and it is certainly not as tough as EMT but it may be as good as FMC or Carflex. I even think the UV protection is better than advertised/evaluated.
If someone is really interested I could probably pull out the piece that is on my boat and send them a sample to look at. This is Florida sun, 10 years with a south exposure and salt water.
The original connectors (split deal that snapped around the ENT) were certainly junk and that may be part of the bad rap. The same is true of the old RNC straps and conduit body covers. I had a Carlon guy tell me the listing standard did not require them to be U/V protected ... and they weren't.
