Yes, I would have to advise extreme caution if you are considering using Vantage at all.
To cut a very long story short:
I ordered a custom PC for £2700+ on 29th June. They charged my credit card same day. All over their website it says 7 to 10 days build and deliver time.
Numerous attempts to contact them after this period had come and gone went ignored - they dont even pick up their SALES LINE phone half the time! Eventually, on 20th July, they communicated that they couldnt yet supply the system, and I was given the choice of up or downgrading or waiting. I said I would wait IF their estimate that it would be ready the following week was accurate. It wasn't. I tried contacting them several more times.
When they did reply, on 3rd August, I cancelled my order at their suggestion, and asked for an immediate refund - since they'd had my money over a month, I was about to start paying interest on cash I hadn't actually spent. They said it would take 3-5 days and that was 'down to my cc company'.
It's now the 16th August, and my CC company inform me I have not received a refund and one is not pending.
My attempts to contact them all this week have been ignored, and they still haven't processed the refund. So I'm out £2700+, more since I have to start paying interest now, while going through the motions of disputing the sale with my cc company, and nearly 2 months after I wanted one, I still have no pc!
So yes, I'd advise you don't use Vantage!