I needed to import an 80MB file into a database. I had issues with the import. I emailed Alexey with several questions. He answered all my questions, and included a guarantee that if the file could be uploaded, it could be done using his script.
I proceeded to use his script only to be stopped by a max_questions error. I emailed him about it, and he said there no way around it. Then he said I could change a couple of lines of code, and it would take 16 hours to import. I tried the changes, but it didn't work.
Finally, I got hold of my hosting company, and lo and behold, they were able to upload it no problem! I let Alexey know, but he insisted that I did something wrong and refused to refund my money.
Do NOT use this script unless you are SURE that it will work. Alexey will find a way to avoid refunding your money if it doesn't.