A little follow up on using the different reservation finders mentioned above
This wasn’t exactly a scientific comparison as I mostly had different alerts on each site, but I did have for example Kona Cafe and 'Ohana on the same dates in all 3 - Touringplans, Mousewatcher and Mousedining.
Mousedining provided the most hits on those overlapping alerts. I believe it was about 6 hits out which 3 were already gone when I logged in, a couple were at an undesirable time and one I ended up booking. Mousewatcher found a couple of times which were no good, and TP didn’t find any of them.
Considering Mousedining gives you 5 free alerts and the price for a whole lot more is cheap, it would be my choice. Mousewatcher is expensive and didn’t work as well in my case. TP didn’t really work for me and is limited to 2 alerts even for a subscriber.