The ease of submitting samples for testing is great! And, the results are usually quick as well. Sometimes it can be frustrating to have to wait for results after having already submitted your sample. It would be better if they were able to send you an email when they receive results so that there is no waiting time and you don't have to log back in to view them. It's very convenient to use as I'm never without my phone or computer while traveling. I love being able to submit and check my results from anywhere at any time.