Sygic are having a holiday sake with 50-70% off their Premium maps.
Unfortunately the World map pack and extras aren't available as an IAP. For Telstra prepaid customers the Australian map pack is $31.31 and is available as an IAP.
I haven't used it but will be giving it a go for the lane guidance feature.
Sorry, what's "IAP"? And do you happen to know if you have to pay for other things like POIs, speedcams, etc.? I actually did email them about this, the reply I received was so vague, it answered nothing.
Just installed this a few days ago, only tried it for 30 minutes or so, so far. It puts a lot of needless stuff on the screen. Which can be a pain if running on a smallish phone screen in the car. Not sure if that can be changed, because I didn't find it very intuitive at all. But maybe that was because I was driving at the time.
Say, have you found anything else that had lane guidance? I think TomTom Go does, but I think they want you to pay every year.