Gen-Y and younger will have no problem learning how to use CoStar but its not very intuitive for the older generations (they have to hunt and peck for what they are looking for and have no idea how to manipulate the reporting features)
Sage is not at all well suited for small companies who want an agile, nimble setup for quick moving situations and mobile use. These type of companies should look elsewhere such as a SaaS offering from another vendor. In addition Sage is very expensive both in its initial outlay and ongoing support. Medium and larger sized companies benefit from a Sage install much more than the smaller constructor. Having the modules all work in unison is important when a company is of a certain size as is having the long tenured support structure. In addition Sage requires the terminals services setup to use it remotely and the larger companies are more likely to have the infrastructure and support for that type of setup
In our market (Portland, OR), not enough users implement the tools that could make CoStar so much better. For example, I specialize in medical but brokers and owners don't take the time to mark medical as an approved use in their buildings so I have to search much longer and cross-reference the data by contacting the brokers directly.
I find it really annoying that when I download documents CoStar doesn't use smart technology to automatically name my files. It is especially irritating since every piece of marketing we post to CoStar has a relevant file name yet when we download the same file we have to rename it.
Sage is somewhat easy to use as far as its simplicity, however, when I first started using it I really wished there were more training materials available. As I did research to figure out what resources were there to learn how to use the paid software, all I found were courses you have to pay for. In my personal opinion, I don't think you should have to pay to learn how to use a software you bought.
They have a very quick, responsive team that assists. They also have great higher-level engineers who assist in more complicated matters and all in all, you need a support team that is quick to respond when you are in the middle of business crises.
There is literally not one good thing that I can say about CoStar. They charge my card $450/month because I signed a one-year contract. They provide very little data and properties and most of the time it is inaccurate. Their customer service is atrocious. They overpromise, underdeliver. STAY away from using Costar!
We currently have Sage in place which handles the majority of our business needs on the back end, but compared to some others that are on the market like Builder Trend, it does lack the client facing side of the house. To make it a better product, a client facing portal would be best so they can be up to date.
Since CoStar has linked with LoopNet we have had fewer bad data calls. By which I mean old data from LoopNet that was available to the general public is now more regularly updated through CoStar so we have less confusion with our clients.
The accounting functions (AP, AR, GL) are mature so it does a great job with core financials. The reports are flexible so it does a good job of providing flexibility in report writing. The application is written for a workgroup so multiple people can use it at the same time. The transaction detail is strong so that a transaction can be rolled back if necessary.