hi
at the moment i run 3 bots, 2 with 7 refresh and 1 with 6 refresh, the 2 with 7 i have inplay betting, and all seems to work pretty well. ok not fast but if your not trading it doesn't realy matter.
OH, and talking about refresh rates etc, today i found out that even if you have multiple accounts with betfair and run bots on each account, betfair adds all the bots API usage together as if it was 1 account.
mcbee