Boulton & Paul Windows

I have been looking at replacing my wooden windows with Boulton & Paul Stormsure windows, but when I asked Jeld Wen if they were internally beaded they said they were not, but 'they are glazed with a security tape which is very hard to disturb'.
I was just wondering if anybody knew anything about this tape or had any experience of it, good or bad. I keep hearing that internally beaded windows are a must for security purposes.
I would also be grateful for any comments that people have on these windows - I haven't found any complaints about them on here so I guess that is a good thing?
Many thanks in advance,
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