I would say YES, definately.
I had one fitted to a former Astra, and it made a heck of a difference. When RR, a gain of 12bhp just from the chip itelf
Because its tailored to your car, it can be set up precisely, rather than the off the shelf ones like Superchips which are crap.
One tip though, complete all the mods you are intending to do first so the Unichip can be setup allowing for all the mods.
If you add anything after, you will need to have it reprogrammed to make full use of a new mod.
£600+ is a lot of money. Shop around because it can be done as low as £450.
I've yet to hear from a satisfied customer with a turbo, although there have been a few dissatisfied and/or angry ones.
Maybe they've got their act together now, but if you don't contact a happy customer with a turbo, don't get your hopes high
Their theory is nice, and they have an (obviously) fake calibraT power graph on the web somewhere. But no hard evidence.
I don't claim to be a Vauxhall expert but when it comes to re-mapping turbo's I have a good knowledge,make sure the tuner knows what they are doing! most just raise base boost and forget to change the fuel mapping etc You should also look for a tuner that maps the system so that first gear stays very similar to standard boost (25% increase ish) otherwise you will get major traction probs plus engine/box destroying problems this may seem boring but from a reliability aspect it's far better to go down this route as first is not not used for long anyway but when you change up and you get a higher boost less stress will be put on your components as you are already moving (get my drift) try to look for someone who can do a personalised re-mapping to suit your car and your present mods