Hi rodee34,
Numbers in iCloud has been a great way for me to share spreadsheets with others. On my side, I have edited the document on my Mac and saved it in iCloud. This has allowed me to use the full features of Numbers on the Mac and not just the more limited features online. Anyone with a browser can work on the spreadsheet. Everyone can see what the others are doing in realtime.
You can check it out yourself before you even offer to share. After saving it to iCloud, go to iCloud in your browser and see what it would be like for your team. See if your collaborators find it convenient.
Since Numbers and Excel are not clones of each other, translating spreadsheets back and forth could become a problem. There are ways of working in the seperate programs that just don't translate. If you all have Excel that may be what you want to work in. If this is your baby and others will be entering data or simply referring to it then I would be sticking with Numbers.
quinn