I haven't used the fleece liner,but I do have experience with the Dropzone Squeeze Me liner(bought from Farmboy at oneshottactical).Very warm and very well constructed.The only downsides to Dropzone products is the price and the addiction to non-issue kit that they cause.
Now that all the gratuitous bum kissing is out of the way,I wouldn't bother paying the money for the fleece.The issued fleece(lord strike, me down!)does just as good as a job as any,is free,and soon will be issued to everybody in CADPAT.Also if they ever come out with a official dress policy on wearing the fleece on the outside,you might end up with a 200 dollar white elephant.If it's for non military use,you would never go wrong with a dropzone product.As mentioned above,the quality can't be beat.
My advice would be to save your money and invest in a Dropzone smock or squeeze me,or if you can find one cheaper,a snugpak shirt or jacket liner.
But after all,that's my 2 cents