I bought the PT4 and I like it very much.
It helps, essencially, ate MTT where you can see how does agressive and Cbetter and range playing are a opponent at that tournament.
Very helpful. It also has the stats zone, that I do not know well how to operate, but can help a lot to you see your accuracy and errors at a tourney or position.
Also you can buy the payed version with
neteller.