Easy to get started with a predictable pricing structure. Most of my attorneys only needed a 5-10 minute explanation of the product before they were up a and running. The interface is simple, but has t he features we actually need.
The speed won't compare with an inhouse solution for most people. That's just the price you pay for cloud though.
Actually use some of the competing products, do more than just demos. Until you're in depth using the product, it's very hard to tell if it will actually work for you. Most vendors will give you a trial period that you can use for this.
We needed a quick and easy way to perform document review for eDiscovery cases. Our previous process was not as refined as it is now with Logikcull. The time attorneys now spend on review has dropped drastically.