Some of the issues were recent. SB has been around since I can remember when the AMG forum guys were running them in the mid-2000s so these things aren't exactly new.
There is feedback in these two SB/PC threads about throwing codes which I haven't experienced. I haven't reread the entire threads but there's some good feedback in there.
Not sure if it is something with their car or failed units but it happens. If the name brand experience these issues, it wouldn't be unexpected for the knockoffs to do the same. Perhaps the knockoffs aren't as popular and thus no feedback posted. Either way let us know how the knockoffs work if you do give it a go.
Sprint Booster & P2121 code
Pedal commander vs Sprint booster?