I used a £150 ABTA voucher to book my holiday to Tunisia on 4th April 07. The only downside is Landround take forever to answer the phone, then to book your holiday over the phone, it has to be out of a brochure, you don't get the online discounts, you can't use any other vouchers in conjunction with it.
If you don't supply Landround travel with your own travel insurance details by a certain time, they will automatically deduct money off your card for their own travel insurance.
They tell you that you have 7 days to return the paperwork and confirm the booking, but I sent it back 2 weeks later and everything was ok.
Have yet to go on the hols.
Paperwork was supplied quickly and I got my tickets 3 weeks ago.