Industrial Scripts is an excellent service for screen writers. They are more expensive than most script doctors - but - they charge a lot because they are undoubtedly good. For experienced screen writers I would give Industrial Scripts an easy 5/5 for any stage in the process. The reason I only give them 4/5, in this instance, is because I feel that their more in depth notes are not as suitable for less experienced screenwriters. My advice to less experienced screen writers is to have the early drafts of your scripts polished by a cheaper script doctor, and then send it to Industrial Scripts for more thorough notes and access to 'Talent Connector' when your project is further along the creative process. Let the cheaper script doctor fix problems with structure and point out any grammar and spelling issues etc. then send it to Industrial Scripts. I also strongly recommend that both more and less experienced writers opt for their cheaper services such as their 'Project Screening Service' or their 'Detailed Project Screening Service' before investing in further doctoring. £30+ seems a lot to be told your idea is no good and ideas are fragile but, if in doubt, get some feedback at the first stages of your project.