Anyone doing ViPR sessions?

Have any of your guys been using the VipR?

ViPR features a unique durable design, integrating seamlessly into any fitness training discipline – whether one-to-one PT sessions, circuits or small group training, to achieve any fitness goal.

It would be great to know what you think of it!

I love ViPR, its tough training but once you get into a routine its addictive and you can really see the results!

Here's a bit about the vipr

I've never used a vipr (I had to look it up ). It seems like it would be a fun toy to play with. It could be a little hard to get a group as the size means a storage issue & people need different weights, so you'd need a bit of space to store them. The style of training isn't really an area I work in, I know a few trainers who work in a more 'weighted aerobic' style who might find these a useful addition, but the price is quite high (here in the UK you'd be talk over £200 for 20Kg tube).
I pay a lot for 'specialist barbells' so I can see if this was something you're serious about the outlay would be worth it. I think it work better if you had a fairly narrow range of strength with your clients, say women wanting to get super thin for example, then you could buy less viprs & fit them into a circuit or similar where you'd get the benefit but not the expense of a whole pile or viprs you'd have to buy to cover a wider range of clients.
They're not a tool I'd use personally as I'm much more focus on the the big barbell lifts than this method of training, but I can see it being fun if you like that sort of thing.