C.M.
My daughter liked m-n-m or mini marshmallows as treat. She pretty much forgot about them and doesn't even ask for them now.
She did not really care about/for the sticker system.
She loves when I dance around after she goes and we sing the "Peepee in the Pottay" song (think Look Who's Talking).
She potty trained best on a regular toliet seat even though we have a Fisher Price one that makes noise. She does use that one as a stool (as it doubles as one) for the potty and washing her hands. But she also carries it around the house and uses it elsewhere so if you are going to use the regular potty (with a kids toliet seat or the regular one) I recommend just buying a stool for their feet. That way they can be more independent about getting up and sitting on the potty.
Use a timer - instead of asking or telling her to go every 30, 45 mins. This worked wonders for my daughter. She was resistant and 'didn't have to go' when I asked her but when I told her that she had to go when the timer went off, she'd tell me it was time to go!