Go. Ask for a table on the patio when the weather's nice.
No choice but to valet park so bring some folding money with you and don't be put off by all the suits if you come for lunch. The vibe is upper crust but it's casual.
Try the Russian Roulettes, but don't order the Fatoosh salad with the salmon which is smoked on premises unless you never want to eat any other salad again. It's that damn good.
Windsor is also the home of one of the best Arnold Palmers that you'll enjoy at a restaurant in Phoenix.