I just upgrade from 1.5 build 1.7xxxx a few days ago.
The upgrade is definitely worthy. Now my HTC Hero (GSM) has a new life!
I was just about to sell my phone before the upgrade. My Windows 7 64-bit kept failing to detect the phone. The problem persisted even after 10 times of reinstallation. I later found out this is a software issue of HTC Sync which is not fully compatible with Windows 7 64-bit.
I did not received any notification on my phone when 2.1 was released. It seems that 1.5 build 1.7xxxx does not support such notification.
This is my upgrade experience:
The first step was to upgrade from 1.5 build 1.7xxxx to 1.5 build 2.7xxxx. I decided to use my wife's Windows XP computer to perform the upgrade since the HTC Sync hates Windows 7. The ROM Upgrade can be found at
HTC Worldwide site. The upgrade was very smooth.
After the upgrade (still 1.5 but with build 2.7xxxx), I immediately received the upgrade notification when I connected to WiFi. So the second step was to upgrade over the air to 2.1.
Among the major improvement I see:
1) No more sync problem. Now I can use the newer
HTC Sync for 2.1.
2) The contact photos on the phone no longer go blur after syncing to my Outlook 2007.
3) Two screenshots are available when viewing an application under the Market. I can now have a clearer idea before installing any app.