Anyone tried the pool balance options in Antminer S3?
No, never had a reason to. Why do you want to pool balance out of interest?
I have a reason for that.

I like to know whether its possible to set quota for these three pools.
Say for example, like 25% to first pool, 30% to second and 45% to the third.
Not with the default software, no.
Yes...with the default software...

..."Balance: Change multipool strategy from failover to even share balance.
Load Balance: Change multipool strategy from failover to quota based balance..."
From S3 Manual...:
https://bitmaintech.com/files/download/Antminer%20S3%20Manual_EN_2014.7.16.pdfCheers,
ZiG
I saw the manual much earlier and I was asking whether its possible to set a specific quota to pools.
Say, we need to set 25% of the total hash power to first pool, 30% to second and 45% to the third.
Look at bitmain's post on P2Pool there additional parameter can be added in the username field with "+" operator.
Like wise I'm expecting some quota to be set via some additional parameter passing with username like for p2pool or password field like in nicehash.