I like that it is very user friendly when you are trying things out by yourself first before having an engineer look over your models/designs in detail (which they do after purchase). If using as part of team then there may be times where some features could stand improvement i would say this was mainly due to lack experience within our own department rather than any faults found at design expert itself - however if used correctly we have seen benefits such has improved designs being drawn up quicker overall time saved! It does seem quite expensive compared to other CAD products available now days so maybe worth taking into consideration what exactly needs designing prior purchasing? I like that you can customize your workspace so you can have the right tools in front of you. It's easy to get lost in the software. I wish the software was more intuitive. I can't seem to get as comfortable as I would like with the software. It's a great tool for working with process models, especially when you are looking at different factors and interactions. I've used it to optimize a variety of different products.