Photo books colour spaces

[Gadget-Guy]

Am looking to produce a few photo books of my work and am looking at either Blurb or Cewe.

Does anyone have any experience of using these two companys and the colour spaces they use for images as had seen that Blurb use CMYK and have a profile for download and had seen a lot of people soft proofing for Blurb in Photoshop in CMYK before transfering to Lightroom?

Was planning to use Blurb through Lightroom 4 or Cewe by there downloadable software.

 

[Irishman]

I just keep my files as sRGB and have had no problems.

 

[droj]

I've used CMYK for Blurb because that route was available, but I'm not sure there's a noticeable difference ... I'd be tempted to go for an easier life & just use sRGB.