I do not think this fitting is approved for this application, but I could be wrong. 
Some areas do not even allow saddle valves on copper anymore.
They may be selling these for pex but this link is not real clear on what the saddle can be installed on. Looks like it could cause people to use them on pex.
http://www.oatey.com/oateypex/pex_merflex_brochure.pdf
I would write it up as a potential leak and recommend regular fittings.
I knew I could count on your Bruce, thank you Buddy. 
I wrote it up.
For the life of me today i could not think of the name of it as I was writing my report. I have never liked those fittings.
At least they tried to trim the zip tie:)