In reply to Removed User:
I've known and seen Excel used to calculate business-critical figures well into the tens of billion quid. In fact I've written plenty myself. In its place its a very, very good tool indeed.
However I've also reviewed many, many excel models from probably hundreds of organisations which have whopping errors.
Sizewise I think my record (review, not build) was a linked set of 388 workbooks, the largest of which were a set of six at 250mb each.
Troubles:
1. Doesn't scale well
2. Too easy for people who don't know what they are doing to make changes
3. Quite difficut to control the environment
4. Various extremely strange bits of behaviour which you occasionally run into and think "WTF????". "Too Many Formats" is an example of this.
5. Is subject to frequent crashing at large sizes
6. High tendency to take the operating system with it when it does crash.
If you accept the above, its fine.
Access is fine for medium scale implementations or relatively simple stuff, and its extremely picky about data formats, but really its easier to go straight from Excel to SQL server if your data volumes are large.