Hello, I have not been on Freelancer for long, so there are not too many glowing reviews regarding PowerPoint work so far, but I am currently working on 3 jobs regarding the tool, and plenty of work over 15 years outside of this site.
I have the ability to make a deck look fantastic using just the right amount of tools - graphics, themes, color, animation, transitions and so on, but I will not overpower the message. Clean and crisp with just the perfect amount of Lipstick and Mascara!
That's what you will get from me.
Good Luck, Wendy