The five year old: He loved it! The learning games were engaging and he couldn't get enough.
Me, I liked the resources that go along with it that you can print off to reinforce what they learned. It was not an overwhelming amount either. We would continue to use it for our five year old.
The 8th graders:
Girl really enjoyed the format and the paperwork that went along with it.
Boy did not like reading online, and zipped through it without really reading it all.
Me, I think it is a great resource for a child you can trust to use it correctly. For a child such as my son who just kept hitting the "next" button, there is no accountability. Only being extremely supervised would this work for him, so I might as well sit down and teach him the material rather than using the computer. Also, there was a LOT of material to print out for the older kids as enrichment activities, and that is a drain on the printer. Having these available to purchase separately as a workbook would be highly preferable.