This is a bit of a tough review to write... I've used I.S. for 6 reports on 2 scripts over the past years and while the reports are of high quality, on-time and exceed what they agree to deliver, their later reports have caused me problems and it's on this account that I can only give a 2. (If I could I'd have given 2.5 out of 5 to reflect the 1 positive and 1 negative experience overall - but given the money the reports cost I can't really round upward to just 'normal' as value for money is key for the impoverished writer). On the latest script I received a positive report from them and then a negative one on a second reading, the second reviewer sometimes citing as weaknesses what the first enjoyed as being well-written. While we all know scripts must impress a wide audience of potential readers it's not useful to receive such changeable or contradictory perspectives like this - nothing can be done with them. Despite an email to this effect last time (unanswered) a third report I bought came from the same reader and continues to cite failings in the script in a (sub)genre that I'm not aiming for and as such is of no practical use to me, a waste of money this time. So my humble opinion: The reports are of good quality and the writers undoubtedly dedicated and knowledgeable. Provided you get a reader that understands your creative intent (or is at least prepared to respect it) you'll have a very powerful tool in improving your story but if not then you might just get a report that leaves you with the choice of ignoring it (painful at the price) or face fundamentally changing what you intended to create in the first place. I've had experiences of both with I.S. and though I was as happy in the first case as disappointed in the second, I'd probably still say go ahead to anyone considering their service even if I wouldn't necessarily use them my current project anymore.