Seatpost Shims...Anyone use them?

I am looking at replacing my seatpost which is 31.6.  I am interested in the Specialized CG-R but it's only 27.2.  Would a shim be alright or anyone use this combo?

Shims work fine. Per tests the Specialized CG-R seatpost is not as comfy as they claim. I recall the tests published online and are by Velo News and Tour Magazin (German). For this reason I bought am Ergon CF3 via eBay (pricey) that I will test this weekend.

I have used shims with no issues.  I prefer to use a plastic shim with carbon seatposts, but they seem to be hard to find nowadays.  As babylou said the CG-R is not a very comfortable seatpost.  The head looks like it should flex, but it really doesn't.  I had one I rode all last year and finally ditched it in favor of the Ergon CF3, but it is not supposed to be used with a shim.  

Thanks for the info.  I may just go with a carbon fork now which is 31.6 then.  Currently running a cheap post now(FSA SL-280) so anything will be an improvement.

I use shims with my Body Float seat post and it works perfectly. 

I use shims and a little carbon paste to help ensure they don't slip. No problems. 

babylou wrote:Shims work fine. Per tests the Specialized CG-R seatpost is not as comfy as they claim. I recall the tests published online and are by Velo News and Tour Magazin (German). For this reason I bought an Ergon CF3 via eBay (pricey) that I will test this weekend.

I must say I'm very pleased with the Ergon CF3.  Though Ergon says no shims my mechanical engineer brain cannot fathom why.

Also, one of the seatpost tests was here.

babylou wrote:
I must say I'm very pleased with the Ergon CF3.  Though Ergon says no shims my mechanical engineer brain cannot fathom why.

Also, one of the tests was here.

Ergon says no shims because they are concerned with the post slipping due to poor tolerances in certain shims. 

Thanks all for the suggestions on posts.  I decided to go with a Kent Eriksen TI Sweetspot post.