I have the finicky fooler (2 of them, hookset), a jawjacker, and three of the first strike indicators. I feel like they all have there place in how I fish.
The First Strike is tiny, weighs nothing, and is nice when I want to have a deadstick down (away from me) on a baitfeeder reel, and not have a higher end rod kept bent under load. I know you can use the FF without hookset version, too. It is nice when me and my son are able to hole hop, have 2 hookset foolers out and a jawjacker, and 3 of first strike indicators out on baitfeeder reels. Cover some ground and weight/size for gear is minimized.
I also want to share I am in no way affiliated with any of these companies, just enjoy fishing and always looking to be efficient with ways I enjoy fishing. That being said, if any of these companies want a new rep for their gear….:)