Do as you say or what that saying was...
So far we've done a saas product (http://www.smoothconversion.com/blog/mouseflow-web-funnel-te...) and a big media site (http://www.smoothconversion.com/blog/everyday-health-web-fun...). More are in the pipeline.
Making a good first run involving BlueTooth pairing is... a challenge to say the least.
My team spent over 2 months trying to design a good flow. We failed. We still meet regularly to try and improve it, but we are never sure how successful we can be.