Okay, I've done A BUNCH of them. PAII, BnB dot com...Merchant Circle...
YMMV. Period. The PAII ones were very good when we were aspiring/first starting. The BnB dot com ones seemed better...but they repeat after a while. Merchant Circle...not my go-to resource. BUT - theirs are kept on YouTube, so if you do a search, you might find lots of options.
The best ones I've done - hate to say it - weren't free. I paid for them. They were more like an online class, though. And it was both expensive (for us) and worth every penny.
JB - I can hardly stand sitting there (for the freebies). I knit or crochet, watch the kids (I try to have them watching a movie at the same time...), check email, take notes, complain on FB (about being bored). Partly, I did them for a while to keep a record of how I was running a REAL business and I was SERIOUS (in case the IRS asked). Once things picked up, I feel less of a need to prove anything to anyone. Every once in a while, a topic will come up that piques my interest, and I try to see it as a good excuse to sit for an hour.