I have used the World freedom tool for many years now, and it always works great, I also have a Kone tool, It is nice not to have to boot up your computer, but other then that they do the exact same job. Not sure what part of the country you are in, but if you get the Kone tool, you will need to know the password for each part of the country, and county for that matter, here in southern California, there are 4 different passwords for the controller. I forgot about this, when i brought only my hand held kone unit to a job, and could not use it because i did not have the password, had to drive to get my world tool, and plug it in and then wrote down the available passwords for southern california. As far as the interface is concerned, they are really similar,
If you are interested in a World tool, I have the latest USB version, it is only a few years old, like new. I would be willing to sell it to you at a great price. PM me if your interested.