I alternate between IAS and UNITAB for whose offering the best price.
Normally I bet FIXED Price .
I,ve found that over $11 TOTE price is usually better.But swings and roundabouts.
I,d say that the majority of my bets would be on UNITAB.
Basically I bet 3 - 4 horses a race.That way I reduce my number of outs and that suits me admirably.
Since I normally bet the last 4 races i,m stuck in front of the computer around 3 hours per day.

Cheers
darky