Whether the traffic receiver is any good depends on both vehicle and area. The system warns of jams OK but on a bike it's almost always easier to filter through it than take the alternative
In a car I found it useful on a couple of occasions when it routed me to nearby A roads when there was 20 + miles of stationery traffic on my motorway route but when I was truck driving in London and the South East a couple of years back I gave up using it. The problem was that in attempts to navigate away from one jam it simply routed you into another. - so it then tried to reroute again - and again - and again.
The problem is, I think, that it works OK when one road has a big problem and there is a nice simple clear alternative with free flowing traffic. Unfortunately, in the UK, that is rarely the case. Even if there is a practical alternative that will have its own heavy traffic plus all the stuff from the jam.
My traffic receiver is now sitting in a cupboard somewhere among the other good ideas that don't really work.