@James Stevens, the Capital Expenditures tab is for all the repair costs. It is much, much more thorough than the BP calculator (breaking down costs into ~200+ categories, vs BPs 24 basic categories). Same with the closing costs tab in the spreadsheet - much more thorough.
Also the inputs for the financing are much more flexible than the BP calculator. e.g. BP won't even let me enter my own loan interest rate, I have to pick from a very small list, with 3.5% being the lowest selectable value.
In the excel file, I can just copy and paste column B from the Deal Evaluation tab into column C, D, etc... to create as many different financing variations as I want and compare all the numbers (cap rate, CoC, etc) for each variation right in one view, something that is impossible using the online tool.
Also BP only lets you make 4 or 5 reports if you're not a pro member, and you can't print them if you're not pro.
Also using the site means you have to have a solid internet connection.
In case it wasn't clear, there are 3 tabs in the spreadsheet, "Deal Evaluation", "Closing Costs", and "Capital Expenditures". First is "Deal Evaluation", where you can calculate your monthly numbers, and compare different ways to finance the deal. Rows 19 and 20 of the "Deal Evaluation" sheet are called "Closing Costs" and "Capital Expenditures", which use the totals that are automatically generated for you from the other two sheets.
So if you enter some repairs needed in the "Capital Expenditures" sheet, they automatically show up as up-front all-in costs on the "Deal Evaluation" sheet. Same with the "Closing Costs" sheet.
I don't mean to hate on the BP calculator, its just that excel was built for this kind of thing, and so the features provided are going to be much better.