I wanted to see if anyone out there has had any experiences you would like to share regarding upgrading to vsphere from esx3.5. Any gotchas, cautions and things you would have done differently in hindsight. We are in the process of upgrading and wanted to get a feel for what might be an issue and what to be aware of. We do not have a test environment that I can try this upgrade in, so this will be a production upgrade and I am being very cautious and careful.
Now real gotchas from my experience but i decided to reinstall instead of upgrading. There are some changes you wouldnt get if you upgraded. Plus i just dont like to do upgrades when its a new major release. It works but ive seen quirky issues pop up.