Ridge Vents

We are nearing the end of a loft conversion and need to put some ventilation high up on the roof face (the eaves are already well ventilated).
Has anyone had any experience of any of the dry-fix vented ridge systems such as the Klober Roll-Fix. Do they last?

..or is it better to simply install several ridge vent tiles.
Thanks

we often use russell dry vent ridge and marley very easy to use and never had any problems but if its a tiled roof why not fit a few tile vents