Same or worse than most of the others, read the small print you will have to look for it.
The Trading Standards should have a go at the numerous large companies like these (95%+ of them)- Unlimited should mean Unlimited, they make it up as they go along.
Bearing in mind these ISP have to pay for the bandwidth used, its in their best interest to deter usage- Nearly all will not state a figure that is unacceptable and avoid answering a direct question on the matter.
Lifted from their site:-
Making excessive use of, or placing unusual burdens on, the network, for example by sending or receiving large volumes of email or excessively large email attachments.
If it’s felt that any Be member’s Internet activities are so excessive that other members are detrimentally affected,
The key factor is no mention of what is acceptable!
3 month notice to cancel or cough up £40. Once on this its harder to resort back and costly.
Went through this scenario last year with V21/Biscit, Netservices and group of companies, bided my time and thought better to actually know what you will be receiving hence why i went with an Entanet Service provider 300Gb p/m after 10pm and 30Gb up to 10 pm £19.99 per calender month, all the after sales service you could wish for in less than a minute, a bad sign when you cannot contact or kept on hold for an hour! Chose www.adsl24.co.uk in February what you see is what you get.
Bandwidth costs money and you wont be getting much for £18, its marketing hype which has to be paid for by you.