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?