This training format is not bad, however, I personally don't like it.
The fact that it takes away a "live" person is what I don't like. As with most other types of training, when you have an "instructor" and you have a question, you get the answer right away. With this online training, you don't have this. If you have a question, you have to email for an answer and the response could be days.
As a refresher course, this is not a bad idea as you may have already had your questions answered from prior sessions. Any changes to the program are usually minor and don't affect the overall program, at the least at the spotter level. Most changes are to the training program itself and minor information is either removed or added, but the spotter and or reporting criteria rarely changes.
Just my 2 cents worth on this..........
Dennis - N8BMB