iWave has an extraordinary amount of data to pull from across a number of sources and areas. Personally, I found the Foundations information to be especially helpful in finding new places to submit grants to and to find more information about current grantors. Review collected by and hosted on G2.com.
There aren't many downsides to iWave. The profiles feature could be a bit better. If there was a better way to track relationships between people within iWave, that'd be helpful. the iWave score is a helpful metric, but the additional "strategies" they suggest aren't particularly useful. Review collected by and hosted on G2.com.
