I posted my first impressions of the HTC Advantage about 10 days ago and have been using it as my primary device ever since it arrived. I actually wrote 90% of this review on the HTC Advantage with a Think Outside Sierra Bluetooth keyboard. Yes, I have even been using it as my mobile phone, even though the form factor is not optimized for this and HTC really doesn�t even advertise its mobile phone functionality. Surprisingly, it actually performed as one of the best quality mobile phones I have ever used, but there are trade-offs that I�ll talk about later. The HTC Advantage is the most powerful and full-featured Windows Mobile Professional device on the market and it is the largest Phone Edition I have used before. HTC�s retail box states that the HTC Advantage X7501 is �The most powerful mobile office� and after over 2 weeks with the device I tend to agree it is an amazing device in a form factor that meets a great balance of compromises. Do I think it is worth the US$850 retail price (Amazon.com price) and will I be buying one for myself after sending back the evaluation unit?