It does look pretty slick. I just didn't know if you could pack too much grease in the bearing and cause it to blow out the seals once the bearings heat up.
I'm getting ready to install two new rear wheel bearings and debated using this tool even on the new bearings ( I read some comments of people that used it that said they were surprised at how many pumps from the grease gun it took to even fill up the new bearings).
Looks like a great item to add to the tool box! Ive gone through a few sets of bearings already and this would have saved me a very expensive rear wheel bearing loss 90 miles up a frozen river that ended up taking out the hub as well.