I can't deny the benefits of tungsten. It's smaller, has great feeling to it and makes more noise than lead. I like it... A lot!
That said, I don't like the idea of paying $6 for 3 to 4 weights. It just isn't realistic. And I doubt the price will come down very much since Tungsten is in a very short supply and takes over 6,000 degrees to melt (which means it's hard to work with). This brings me to my next issue. For those of us that make our own tackle, tungsten is just not possible to work with. If there was a total ban on lead every small time tackle company would fold or move to steel and brass.
Oh yeah 1 disadvantage of tungsten (and it isn't a big deal) it's so hard it will smash your glass beads. I can't tell you how many beads I've broken with an 1/8 oz weight.