I also bought the amfilm screen protectors. I have no regrets. Came in very sturdy packaging, easy to understand instructions, all of the wipes one would need, and I installed it within minutes. No bubbles or other issues. Looks and functions great.
The one in OP also includes all that cleaning stuff, as shown in the last picture. As for one being more reputable, that's all well and good. There are some instances where I prefer to risk being a cheapass and offbrand screen protectors is it.
As for the reasoning of having two, in the case you mess up one, its not like you can't just purchase another single pack. Let the consumer decide. Application is already quite easy.