I used it last year with great success. The only thing I don't like about it is that it's stinky. I switched to a seaweed/bat guano fertilizer this year.
The fish fertilizer for me seemed to grow a bigger plant, but not neccesarily a more fruitful plant. Hasta-Gro fertilizer so far is my favorite because it has more phosphorus in it, which I was told that is the nutrient needed to develop fruit.
Watch out if you have a dog too. They like it--especially my hound that knocked over the bottle and drank some of it!
The plants love it, and so do the Raccoons! I've already had a few plants ripped up because they're looking for that little fishy they smell in the soil
I've been bringing plants I recently fertilized in at night.
I use the Alaska brand fish stuff. This was discussed on another thread I think. It is fish based, but not truly organic. It is deodorized, which I appreciate! As I have mostly herbs am selective. There are now about 150 containers and some in-ground herbs & flowers. Most of the herbs do better with lean soil, which means they don't grow real fast! My one exception is basil. I try to fish that 1/week, and sometimes hit the chives and tarragon to urge growing. The rest I do about 1/month.
I mix approx 1/2 cup in a 5 gal bucket of water, and dip that onto the plants with a large plastic folgers coffee can.