I've been using Cmaps for a couple years. I used the 100$ last year and you get a lot more information back. That being said I've used the free version this year and upload the data and wait for it to become public. Works great on the lakes I fish (WY) which no one covers because of the expense to create. There's a long conversation on the WY page of the pros and cons.
Ice Fishing Wyoming / Re: Navionics vs custom social maps