I've got a cheap little Willem and it works for most of what I need it to do... I have some troubles with 2532's... but, after a few tweaks in the software they eventually program for me.
But, whether it works or not is beside the point, if you have the money to get something better, I'd do it. There are some problems with Willems (voltage issues) that are a PITA to work around sometimes. But, I only had 40 bucks to spare, and wanted to convert my TwoTigers back to Tron at the time. So... it worked for that, but still... don't get a Willem if you can help it.