I have taken advantage of the free Altadis sampler twice so far (used a different address), and both times I received quality stuff!
The first go around I received a tin of Sutliff Private Stock's Maple Street, which was seriously one of the best aros I have ever tried to this day (and I have had many aros).
Second go around I received a tin of Sutliff Private Stock's Blend No. 5, which was not bad at all either. It is a knock-off of Dunhill 965, but I think that it is an amazing latakia on its own merits. Both times I was pleasantly surprised!
Don't be afraid to give it a go!