I had a similar positive experience as a previous poster.
Keane contacted my 78 y.o. Grandmother regarding residual stocks of my great-grandmother's estate (not aware of their existence, primarily due to multiple splits/other holdings complexities). As a CPA, I quickly took over all correspondence.
In my personal experience, they've been courteous, professional and responsive to our many questions throughout the process. That said, I'd probably not be comfortable paying a 35% fee to them either - they are taking a 15% cut of what amounted to roughly $70k.....With a ~$60k net check (after their fee) related to money we likely never would have discovered, I'm more than happy to pay them 15% to deal with the multiple complexities - better them than me! :)