Its quite useable with the current indi driver if ones takes care to set the parameters in the right order. I'm able to get exposures up to 200 sec, both through indi, and direct RPi command line.
However, I've been running it alongside a ZWOASI 120MM-S in a plate-solving project to compare performances. The small pixels do seem to be an issue. To get anywhere near the same sensitivity as the ZWO camera I have to bin it 4x4.