Due to take the GRE on the 28th of July

[lookingahead]

Hi Guys ,
I have sought help and information regarding the GRE on this forum and have found people willing to help, hence here i come to seek some more advice.

I gave the GRE TestPrep test today (Practice Test 1) under test conditions and got a 1500 ( 700 Verbal , 800 Quant) what i want to know is how good an indicator is this of the actual GRE score that i might end up with.
Since there isn't much time left for my test and i have booked a date on Aug 20th as well (playing it safe is the word here ! ) , i would like your feedback on how good an indicator is this.

Also some advice on pacing since i happen to finish both the sections about 2 minutes to spare , i would like to utilize my time better.

Regards