CWC's and the clones are good watches...
...Though as Shane points out, the price differential between the CWC's and the clones is pretty large. The CWC's are true military contract watches, and have to meet or exceed the Ministry of Defence's specifications, while the clones do not, though many in fact can (read below). From a collector standpoint, an issued "SBS" (and they are still issued to UK special forces, including SAS, SRR, SBS, and others) is far more desireable (and rare) than either an unissued CWC or a clone. The CWC's while overpriced (the MOD doesn't pay anywhere near what they list for with Silverman's) is a solid, reliable Swiss-made dive watch with quality ETA quartz movement.
With the help of a good friend, I've been running a test since late this summer using one of the 'Ray' SBS clone divers. It's one that Jeff the WatchDude customized, replacing the base '0' jewel quartz ETA movement with a very nice 7 jewel ETA quartz movement, a nicer version of what CWC actually uses in their MOD divers. Watch was pressure tested after the movement installation. My friend in the UK loaned the watch out to two buddies, the first who took it for a month through urban combat training prior to deployment to Iraq, the second a raider boat instructor (SBS craft) who also used it for a month, including combat training dives below 70 metres (230 feet?). It came out of all that without a scratch, keeping time dead on. The watch went to Afghanistan on a short deployment, and will go back with my friend again in Feburary. I'm told that every one who has worn the watch has loved it, and asked if they might buy it, though it will stay with my friend after this next deployment.
Mahalo,
andy