pp ive been using betfairs sp service for both win & lay betting for a while now without any problems

couple of things as it sounds that, like myself, you will often need to place bets early & therefore use the sp option -

-you can set a minimum price for your win bets & a max odds/liability limit for lay bets

-sp is not available for place betting

-sp is not available for all aussie meets - eg 'qr' meets & the 2nd meetings at
prov/country tracks not covered, although i hear that will change once demand is met

-theres no guarantee that all of your larger bet would be matched using sp, which could be a tad disappointing if the nag salutes, but if your betting in the short end of the market at major meets i would think this unlikely to happen very often if at all

theres probably a few more issues but thats all i can come up with this early in the day