Conclusion: The TomTom GO LIVE 1535M is a solid choice for anyone who prefers standalone GPS devices to cell phone apps, but still wants some Internet connectivity, and more accurate traffic reporting than those apps can offer.
Pros: Accurate routing. Informative display. Internet-based services are a nice extra. HD traffic reporting is a standout.
Cons: HD Traffic and Internet services cost $60 per year to renew. Occasional GSM buzz over car stereo speakers. Clumsy POI search.