I picked up FlexT9 a few days ago when it was the free app of the day on Amazon. It is INCREDIBLE!!! And I do have it moved to my SD card. The only problem with doing that is that it will not be the default keyboard after a reboot. It takes about ten seconds to re-select it and I only reboot every couple days, so it is space well saved IMO. It has no slowdown or anything like that. The keyboard itself is amazing. It is like an improved SWYPE with nearly perfect voice recognition. I got it free, but it is well worth the $5 that they ask.