Total bunch of lying tossers in my experience. When we moved into our first house, the day afterwards one of their salesmen rocks up. New windows was on our list of stuff to do so we thought we'd get a quote. Spent flippin ages trying his hardest to get us to buy windows there and then (they day after we'd moved in!), trying to do us deals, finance, all kinds of crap we weren't interested in – we told him when he walked through the door of our situation and that we just wanted a rough price for future.
2 hours later, we eventually get rid of the annoying little ****. An hour afterwards, his "manager" calls us to ask how the visit went. We were then fed some rubbish about this salesman we saw not giving people good enough deals and that if we invited him back, he'd be able to knock some more off.
Told them to shove it.
Where are you based? We eventually got windows from Coral who are 100% superb. Yes, we occassionally get the odd call from them "we've done your windows in the past and were wondering if you wanted anymore work doing…" but they're always VERY nice and not pushy at all.
Safestyle? Steer clear IMHO. They're as shady and as cringeworthy as the **** on the adverts.