i havent had 1 coaster problem yet with the ritek media. the g04s are great sop far had over 500 dvd-r's and no problems yet. Only time i had a problem (problem was on my fault didn't know how to work a certain program) was when i was testing a new program called Movie Edit pro to convert some divx videos and turned em to dvd's and all them other DVD options to it such as DVD menus and so on....