I've been a supporter of John/LearnLogos since my early L4 days. I initially participated in the free live webinar sessions, which I likes the interactive group based format. Soon after, I purchased the L4 training bundle. When L5 was released, I purchased that also. I haven't purchased the L6 training bundle yet, but I have it on my list for when I am able to. They are well worth the cost and are high quality. I highly recommend them.
I will also recommend the topic webinars for download. They are a tweaked duplication of the live webinars.
LearnLogos is great! Their Video bundle on Logos6 is interactive and you can move at your own pace, or you can simply select to watch the videos.
They even have a lot of other videos, too. They were the only one that had anything explaining syntax searching and at 5 USD, too. That is basically why I got interested in them.
MP on the other is good, but in my opinion not for the price, because they do not cover much of what I want to do with Logos.
חַפְּשׂוּ בַּתּוֹרָה הֵיטֵב וְאַל תִּסְתַּמְּכוּ עַל דְּבָרַי