It's as perfect as can be. First time using the program, it took me maybe 2 minutes to make a ringtone and have it on my phone. I highly recommend it, and the 10 dollars is completely worth the time and energy that went into making the program as easy as it is.
oh i know how to delete default ringtones of your iPhone.
First you need to jailbreak your iPhone and go in cydia and search SBsetting and install it all of tutorial is on youtube how to do it and when you have SBsetting and go in cydia download OpenSSH and install it and on your computer you need to download winSCP and tutorial about WinSCP on youtube and when you have done all of it and go in WinSCP and login your iPhone device in WinSCP by your IP address on your iPhone and it will open up 1 page like new folder with a lot stuff and on the right side is your iPhone system and you have to press backspace of your keyboard 2 times and go to var/ and scroll down and go in /stash and go on Ringtones folder and click on the ringtones you wanna delete and click on it and press delete key up to arrow key and click on OK to delete your iPhone ringtones but when you delete it you can't get it back cos they don't release iPhone ringtones anywhere for you to download it. Ok and good luck to do it i just figure it out. If you have a question go to youtube and type SuperDongtimo that is me and leave the message if you want.BYE BYE.