This one of the really great commercial software available to Amiga users. Nowadays really big part of the Amiga software comes from the shareware and PD authors, but software like this really justifies its price and commercial nature.
There aren't that many spreadsheet programs available for Amiga as there are for PC's and realizing the amount of people using this kind of software you really can't expect that much, can you? TCalc 4 is a really positive suprise. I had the older 2 version of the Turbo Calc about a year ago and since then a lot has happened. If multiple sheets in a folder, postscript output, animated charts, context menus and 60 new functions to name a few sound good to you then you should get the Turbo Calc 4.
Installation is a breeze with the provided standard installation script. You can select from 4 different languages to install: English, German, Italian or French. After installing, you are ready to go. You have propably seen a spreadsheet program so it is no surprise what kind of a screen you see after running the program. Normal grid with toolbar on top of it. Toolbar itself is user definable i.e. you can select what actions to include. I am not going to get into deeper of workings of an spreadsheet program. Just want to mention that Turbo Calc 4 doesn't have to be shamed of if put side to side with Excel (PC spreadsheet), you can do just about everything needed by average and more advanced user alike and it is fast (tested with A4000/030/25 Mhz).
Good tutorial guide file is provided to familiarize a beginner with the workings of a TC4. Other help files are really extensive providing all the info about everything in the program. Overall if you need a spreadsheet program for your Amiga, then this is the choice.