Edit, ignore my comments. I was on my small screen last night and didn't realize that was the PVA based sealer in the picture until I read Kyles comments . My comments were on their generic wax sealer. I haven't used their PVA sealer.
I've got a tub I've been using for a few months. Works as good as any I've tried, but seemed a bit runny to me compared to others I've used. I've not really compared any brands, I just search for and buy the cheapest when I need some.
No problems I've noticed, but really only using it on spindle blanks. I use PVA on slabs and log sections, and don't use sealer on twice turned bowls (use paper bags).