Your Opening Scene Effing Matters
They don't care how good you think you are. Don't say "But my next scene is where it gets really good!" They don't care. You need to be good on page one.
Many professional script readers will only read to page 20. It's not because they're lazy; it's because they don't need to. If you can't pull them in within the first 20 pages, then the rest of your script can't be that amazing. It's like, if you don't even dress fancy for your wedding, how could we expect you to dress fancy for work?