well, that has the possibility for a good connection, if you have clean and/or tinned wire and you keep heat on it afterwards, untill it wicks the solder up into the cable itself, otherwise, it's just a dry connection. and, anyone spending much time working on circuit boards knows what damage a dry connection can do. i use the hammer crimp all the time at work, even installed a mylar block on the bottom, since it's almost always pounding against a grounded surface of the truck on a live wire. when that is not available to me, i use the solder trick, and punch the connector first, if i have a punch with me. mostly on solid terminals, only sometimes split crimps, which usually get rolled in with bull-nose nippers, or punch, and then pressed in. either way, soldering the terminal to the already tinned wire is the verry last thing before heat-shrink. i cannot stress how much of a difference a solid mechanical connection makes for long-term ampacity, and continued low resistance. my $0.02
(@ the solder then insert method)