I'd say it's worth the money you'll put in it. Mainly cause it's very durable and well built.
Of course it's not packed with the latest technologies on the market. Its a good vape, proven safe, with medical studies. S&B always will be there to repair your unit, and ship parts, its a solid company who won't disappear. The product is finalized, no bugs or any kind of stuff like that. It has been proven to work really well over time.
The most important thing. You've got to like bags. The problem is that they keep the smell of the previous sessions, so if you go solid valve you're gonna need a second kit to enjoy the pure high end taste. What I love with bags is the absence of draw. You can't have this feeling with direct draw. So easy and smooth, the volcano does all the work for you.
I also like to use my direct draw unit over the balloon some times. In fact I like all kind of delivery methods while vaping, they all have their advantages.
You guys talk glass and stuff, that's not the same kind of products imo. They break. Not the volcano. I wouldn't compare them. Getting an expensive glass, you're really lucky if you use it 10 years. Not saying they're not awesome. I wish I could.
But if you talk money spent on the long run, invest in something durable like the volcano is a good choice imo.
Also, consider reliability. For 4 years it was my only vape. I would have been really embarrassed if it has failed. If getting medicated with a vaporizer is a everyday need for you, its comforting to have really sturdy units. I feel like I can count on em.