Any computerized assessment tool is only as effective if ALL relevant information related to resident care is also entered electronically. Unless your facility has adapted full electronic documentation, you're not really missing much. With a commercial MDS software, the facility may only be able to utilize a limited feature than what the program can actually provide. Not to mention initial cost plus upgrades, and the upcoming MDS 3.0 version.
Some software vendors and their link...
http://mdsinfo.org/Vendors2.html