DW and I retired early, at ages 56 and 54 respectively. I am ex-IT too and was very happy to get out of the business. Just joining the chorus that healthcare costs will hit you the most.
We started saving/investing for retirement in our 20's, so we were prepared. I always give the same advice for people thinking about retirement, but are unsure. You need to track your expenses, try to anticipate what future expenses you may have, and amortize as best as possible.
We tracked our expenses, literally to the penny, for 3 years on an Excel spreadsheet. We created general categories such as house-related, auto-related, food, entertainment, etc. We then could amortize anticipated expenses (as best we could guess). That is, figure that you will eventually have a car payment. You add that to your anticipated future expenses. If you have a house, you need to add an expense you have not incurred for the $10,000 roof you will eventually need. Same kind of thing on car repairs. You may have a new car now, but three years from now you'll start needing $500+ a year for maintenance costs. Then, do you want to travel, eat out more, some other form of entertainment? You get the idea.
It's work, but without it, you're making a very uninformed guesstimate and every article I've ever read shows that people don't look at their expenses and vastly underestimate their costs in retirement. Then, as discussed on another thread, you need to be aware of tax ramifications and plan for that. I have no idea how sophisticated you are as far as budgeting, spreadsheet, and tax prowess.
Your 'financial situation' is really only part of the picture. I'm guessing that you have some pretty good estimates of future cash flow, but probably don't have the expense side of things, as I'm discussing here, thoroughly thought through (too alliterative there).