I've used a few brands, currently usuing Aquasonic salt, been having mixed results with it as far as it's dissolving and salinity levels being different batch to batch.. I done a lot of research into the NeoMarine salt before leaving AS and it seems the goods, haven't used it so can't comment from that perspective, also the Red Sea Coral Pro has been getting great reviews amongsts members, as
Matt G said he swears by it.. IMO nothings better than fresh ocean water if you can get it (we've had the river in flood here recently which is why I've had to use ASW)