My Jungle card arrived yesterday and it's awesome! I have a lot of other cutters, but I find that I'm using my Slice a lot. There are times (and I'm finding it to be more often than not) that I just don't want to do all the paper piecing involved with the Cricut cuts.
I still use my Cricut and will never sell it, but I definitely believe there's a place for both a Slice and a Cricut in my crafting stash.
I noticed MM will be putting out a repositioning spray adhesive. I use Krylon right now, but will give the MM version a try.
Your past mistakes are meant to guide you, not define you.