We have used this software to annotate images from our data set, which are very important when it comes training models that will be deployed by us later! The user interface of infolk's product works perfectly fine (especially their Android version). As I said before we use them as an intermediate step between manual annotations done manually or using other products like YoloV3 etc., but they can also work directly without any intervention if you want your pipeline completely automated. Nothing specific really - sometimes there might not always load quickly enough so some time-consuming operations needs extra attention while working through those problems; otherwise no issues at the moment since everything was going well until now :).