OV10 or Klober eaves closer for counter battened roof

[lookseehear]

I've seen a few mentions of the OV10 https://www.roofingventilation.co.uk/Over-Fascia-Vent-10mm-x-1m-Harcon-OV10 vents going over the felt support tray to get ventilation into the counter-batten space when using full fill mineral wool between the rafters and a low resistance membrane.

 

I've just seen this product from Klober which seems to do the same job - anyone used this? https://klober.co.uk/roof-ventilation/eaves-roof-ventilation/p/eaves-closer