I've got experience in using excel for sophisticated application. My advantage is that I built lot of usefull workbooks and use them later. Regarding that I understand programmer and customer point of view. In my Excel portofio I have got several work done in different fields: - production -> workbook for planning over 500 products on four production lines - financial -> workbook which download history of shares prices and analyzes is according to pre-defined algorithm. Final result is signal: buy / sell / wait. - logistic -> analysing of warehouse articles - quantities, status: obsolete, available for rework, etc. - data bases, analitical workbooks, any many other.