Having added borates to a number of pools early this year and comparing them with similiar size pools both in volume and bather load I have noted these early observations.
1. Pools with borates certainly have a polished look about them.
2. No real noticeable difference in feel on the skin, reports on this were extremely favourable prior to adding borates due to the BBB water treatment method.
3. Cannot comment on slowing down of Algae because I don't have any BUT if the reducted amout of chlorine usage I'm observing from those pools treated with borates is a result of slowing down of algae grown then yes it gets a tick in this box.
4. Adding borates has made absolutely no difference in my waters ability to resist PH rise. Pools with borates added are rising in PH as much and as fast as those not treated BUT the amount of Acid to lower the PH has increased on those treated with borates.
Edit.. Before somebody asks my Alkalinity levels are low.. Very low due to the amount of acid I'm using to get the PH down.