I have been using Prodibio for a little over a month now. I received the fullkit with the bacteria supplements and everything. From my experience the soil does release a little ammonia which feeds the bacterial supplement. From testing I found around 1ppm ammonia for the first 3-5days and Nitrite showed up on day 3. Meaning that the prodibio bacteria had done it's joband completed the first part of my tanks biological filter. By day 5 the ammonia was no longer testing. It took around 2 weeks for the 2nd part of the biological filter to complete and the nitrite to fall to zero.
The PH has held steady at 6.2-6.4 via API test kit.
I planted the tank at day 7 with many different dwarf buce and some flamingo crypt. Very slow growing plants. And while it hasn't been long enough to notice any significant growth yet. There hasn't been any negative impacts on the plants either.
After the biological filter finished developing I did a 90% water change and stocked the tank the next day with 10 high grade flower head blue bolts. They've been in the tank for 3 days now and all is well.
I would recommend this soil to everyone. It seems to do it's job very well. And the small ammonia release coupled with the bacteria supplements will grow a strong biological filter in short order.