guidance to a new one

sir, i am doing stock market simulation and paper trading for almost a time of six months.so i need to get in to real thing. I am a little bit confused on opening my accounts. By doing some research i came to a conclusion that ZERODHA is best for intraday trading(please suggest me if i am wrong). My question is shall i open both demat and trading account with them and do my transactions with it or open a demat account in any bank like.. sbi, indian bank, andhra bank, hdfc, etc.. and open only trading account in zerodha. what are pros and cons if i open a demat account in bank(like transfer of funds,delivery slips,etc.).
please suggest me sir. i am a new one here.

Read reports that it is not safe to open with some companies as they have control or final authority over the share. Why not go for an account over which you have full control.

I am also new. I have just applied for starting account at zerodha, trading is activated, now waiting to get my demat account activated. I am not aware for starting demat account somewhere else and linking with zerodha trading account.

Will be nice to know from any experienced members if that can be done ? is there any risk in having demat account with zerodha(I think they are doing it through IL & FS).

hai there!
how many days did it take for your trading account to open?please share so we all can know.

It took around 20-25 days to open the account. Now it is live but I am still not actively trading. Just studying on how to go forward.