Omnigraffle handles flows and diagrams better than other tools I've listed above. However, Axure is far superior for creating wireframes and turning them into interactive prototypes (basically "coding" using if/then logic statements). Sketch is much better for detailed design …
I can keep up with our UX/UI designer using iRise, and he's on a Mac and loves the Sketch, inVision software. I often trump him, by having all the direct customer feedback in place. This also works well with Pragmatic Marketing's approach to software. Requirements can be coded in line with Pragmatic's Strategy to Tactical framework. Love this software!
Omnigraffle is great for documentation, mapping, flowcharting, and other technical diagramming scenarios. It's simple enough to bang out a quick illustration and powerful enough to build complex blueprints for complicated technical systems. If you need cross-platform compatibility, though, you're probably better off looking elsewhere. If you want complex integration with data sources (ala Visio's SQL Server integration for shape metadata), OmniGraffle also falls short — but those scenarios are few and far between in my experience.
Recently my client has to have hovers as an enhancement to the current app. I used irise to show them how it would look in the future and they didn't like it. Finally because of the irise wireframe they decided not to have the hover - which was good before it was too late.
Client wanted a new interface to import Excel docs into the interface. I used irise to prototype the whole functionality.
OmniGraffle is fairly simple to use, but the one thing I think it does best is working with curved lines, particularly if you are using some of the available arc templates. Drop an arc onto your page, then tell it the dimensions it needs to be, and viola! Done. Manipulating the arcs is as simple as clicking and dragging offset points.
OmniGraffle has also done an excellent job in stirring up the creative minds of many people who create templates and tools to work with OmniGraffle (not that Microsoft hasn't done so either), and managed to get the bulk of those into well organized repositories.
What it all boils down to for me is: it just works. One doesn't need to have a computer science degree to work with it either. It is as simple or complex as you want it to be.
When working on a complex page that has multiple sections with multiple views of each sections, it gets difficult to navigate to the section you want. It would be easier if there was a search functionality for searching the sections or components within the page.
Drag and drop controls to have more properties. e.g. for a button. It would be easier if the properties included BorderStyle, BorderWidth, Color, BackColor etc. Currently, these options are not available on the properties and we have to use the formatting tool bar.
I'd love to be able to keep more than one of the different tool tabs open at a time.
The stencils are amazing. Would be great if a whole lot more of the free ones came standard as opposed to having to download them from Graffletopia or other sites.
This platform solves the problem that enterprise software sales teams encounter, and iRise cuts to the chase. Sales people often say "do your magic thing with the prototype" and the customer gives immediate feedback, we change it on the fly
We have used iRise instead of tools like Word, Excel, Visio, and other diagram tools found online. iRise is good because I think it captures the good parts of all these packages into one. I am able to easily create diagrams and mockups in one software package instead of cobbling together a bunch of other solutions.
While these other tools are great for what they are, OmniGraffle’s solid focus on and support for diagramming makes it our tool of choice for communicating workflows and concept relationships, creating documentation, and creating other diagrams. Its libraries allow us to create designs quickly, and its ease of use enables us to use the tool widely across the company without much time or effort spent on onboarding.
Omnigraffle isn't an expensive software tool, so there isn't really any negative from the perspective of raw cost. Thinking in terms of time spent using it on a project - what you create in omnigraffle will inevitably lead to a dead end. It's useful only as documentation. There are other tools like Sketch that integrate into prototyping software and can create useable visual assets for applications in addition to being able to create wireframes.
