If your need to create diagrams, process charts, website or graphic design then OmniGraphic is certainly something to look at. This is is a good time to look at OmniGraphic since they are about to release version 7.
Linda.com has several hours of training on OmniGraphic 5 and 6. It's a good way to learn some of the features of the application. It's certainly worth looking out if you have a Lynda.com subscription, and if you don't have a subscription, you should certainly sign up for their free 10-day trial.
Why I used OmniGraphic
I purchased OmniGraphic in 2005 to help with some onsite training. The application provided the right tools to create attractive looking process flow charts.
OmniGraphic Pro was necessary for me to open up all the Visio documents that customers would send me.
New Features in OmniGraphic 7
Version 7 is a complete redesign with lots of new features and functionality. OmniGraffle website list the main features being: Infinite Canvas, SVG Support, Artboards, Stroke to Shape, Text to Shape, Point Editor, Keyboard Shortcuts.
Right out of the box the Infinite Canvas is very nice, now I don't have to worry about the size of the document. I just open up the Application and get to work. The adjustment of the Inspector pallet to the window is much easier to read and deal with.
Scalable Vector Graphics (SVG) Support is nice, EPS support would have been better. I have found that there are way more EPS files than SVG files. For example on CreateMarket they have 8,424 SVG files, and 136,662 EPS files. Perhaps over time there will be more SVG files.
I don't understand the functionality of an Artboard. I have seen it in other applications, but really don't understand it enough to appreciate the feature.
The Point Editor is nice, now I can easily add the right number of magnetic points that I want to put on a shape.
There's lots of cool stencils that come with OmniGraffle 7. I really like the three-dimensional stencils.
Upgrade Path to 7
There's a lot of cool things that the Omni Group put into the latest version that - for me - it's worth considering an upgrade cost. What is it going to cost to upgrade from OmniGraphic Pro 5.5 to OmniGraphic 7?
OmniGraffle has a cool tool on their website to check the license key upgrade path. I did a quick query and found that upgrading from OmniGraffle Professional 5 to Omnigraffle 6 will be $49.99 and the Pro version will be $99. The Professional version has AppleScript, Shared Layers, Tables, Shape Combinations, Visio Support and a few other tools. Since I like using Tables, I would have to upgrade to OmniGraffle Pro 6.
I haven't decided if I'll upgrade yet. The features and functionality look very promising.