I'm currently about to edit my best friend's novel and am working on editing a poetry book for a friend of mine. As well as some short stories/beginnings of novels that are sent to me.
I'm not big on erotic and romance genres but will read mostly anything else as long as the premise of the book sparks my interest.
I use an online program to point out small issues and then I read over the words and edit the material as if it was my own work.
I do use the comment feature in Word as it allows for smoother editing and it is easier for the person to see what I recommend, verses it being typed in the document.
I am not harsh and commend points that I feel are well written.
*Note* It probably will not take me 20 days to complete the request(s) in question. This time frame is because some may order multiple gigs at once and those can take longer to edit. Typically if it is only one gig of 1,000 words I can get it done in a few days.