hello all, sharing my experience.
ces is a lot better and faster then wes for u if u r immigrating to Canada only.
back in 2013 when I applied for assessment, I 1st selected wes, I sent my docs which were attested by my unis examination controllers and then hec and I received them sealed from hec and sent it to wes by myself but wrote it from hec cos hec doesn't sent doc directly to wes (back then may be today also u have to send it ur self, u just receive sealed envelope). after 1 month wes said on email that they don't recognize my one uni and hence sent the package back wasting my precious one month and refunded the fees after 25 business days.
I didn't waited for the package, i made the copies again, again got them attested from my unis then again sent them hec to get attested, then sent it to ces. below is my timeline
sent complete application to ces via urgent dhl on May 18th 2013
fees charged via CC by ces on May 21, 2013
processing started by ces on May 23, 2013
equivalency issued by ces on July 2, 2013 (after 39 days)
received email from ces on july 2, 2013
received post from ces on july 3, 2013 (i applied through an immigration consultant, his office is in Toronto, so i gave returning address of his office and that's why he received the assessment and the same day he applied for me from Toronto to nova scotia.
but badluck was that my noc was 2174, by the time my app received at cio on july 5, 2013.....i knew quota will expire for that noc as 2174 was the fastest one. so due to the laziness and slow processing of wes (they took one month to inform me that they don't recognize my one uni!) my whole one year was wasted! now i applied in 2014 and Alhamdulillah waiting for MR.
i would recommend ces for those who are only immigrating to Canada cos its based in Canada and it process faster then wes, plus when cio contacts them for cross checking, they respond faster then wes cos they both are in same country and hence waste less time.
cio considers ces assessment more valuable cos they have specifically designated this body to assess for immigration of Canada only, where as wes assess for whole of the world.
processing times as i have mentioned are a lot faster then wes.
they recognize more institutes and unis than wes.
hope that helps, but still i don't stop any one from applying to wes. good luck.