I Was looking for a good and working module, especially for Rabobank Omnikassa, because extensions for this part were hard to find. I find it with this one! Not only Omnikassa, but all other iDEAL interfaces are well supported. The Joomla administrator interface looks very nice too and is very functional!
The support is great. Within about 30 minutes the developper replied and even had fixed it in that time, even on Sunday ;-)
I can recommend them to everybody!
Have fun with it!