Hi Ciaran,
I am not buying in your block, but can tell you I purchased 2 in block 1 November 2003. Under our gurantee we exercised our right to obtain our deposit back on 1 and keep the other for how ever long it took to complete. We should be completing Tuesday 26/10/10 nearly 7 years later. Not the 4 year build promised, but we were not in any rush.
Hope this helps.
Lily