I much prefer other cameras than GoPro. I had a GoPro but sold it, it's just too awkward to use. Also I had very bad luck with getting various microSD cards to work. Only 2 out of 10 cards that I owned worked with it, even though all of them work just fine in every other device I own including cheap Chinese HD action cameras, Contours, Sonys, etc. When I called tech support, they were really snotty and basically said that if I didn't buy such crappy cards, I wouldn't have these problems.

Also after using the cards in the GoPro, they wouldn't work in other devices until I reformatted them multiple times. There are other cameras on the market that do the same job for half the money and are easier to use and more compatible, so I just went that way.

As for the memory card, it should work. The Sandisk Ultra is absolutely the one to buy and it worked fine in my GoPro. The Hero3+ says it'll work with a 64G card. I don't know enough about the "non plus" version to say for sure. Above 32G you transition from SDHC to SDXC which I think is actually electrically different, not just software different.