Seems like lots of people have weighed in here but this is my two cents. I would always look at a piece of equipment and ask yourself "what is the worst that happens if it fails" I have used Jebao powerheads and return pumps through my apex when I was starting out because if a powerhead fails its not the end of the world.
That being said, if this dosing pump fails on and dumps a ton of alk or calcium into the tank you could lose everything you have and in some peoples cases thats over $10,000 in corals. So for me when I look at it that way, id rather spend the extra 200 dollars making sure that will never happen.