I also use microsoft autoroutes on a 15''laptop for planning routes when in the truck of an evening.I have numerous poi on it and it's an excellent mapping programme,the best in my opinion.It's a shame that microsoft have discontinued it and withdrawn support as of last year but it is still working well and long may it continue.It's handy to get the coordinates of the next destination(s) from A/R and input them into copilot on the smartphone,really easy and intuitive,you can even plan an itinerary using copilot
I have upgraded the stereo head unit in the van so the smartphone is connected to it via bluetooth,then the lovely Emily instructs me through the stereo speakers,no problem hearing her lovely seductive voice although she is a bit more classy than that tomtom scrubber Jane.If I get a phone call I answer it and it's hands free,overrides the satnav and is nice and clear.
I don't think you have given this system a proper test Barry with your I phone4 small screen and lack of volume,at the risk of repeating myself I find copilot is superior to any stand alone satnav.I drove to Spain last year with 3 different satnav systems working as a test-Autoroutes 2013 used in conjunction with a GPS dongle(loaded on a 10''samsung netbook),a tomtom 5000 and copilot loaded on a samsung S4 smartphone.Copilot won hands down,the routing and re routing when lost was much quicker,instructions clearer,quicker to lock onto the GPS signal and generally more user friendly,intuitive and lots more adjustable parameters.
With the correct equipment installed Copilot works extremely well in practice but if you're happy with your current system then why change.