Yep - it's great for utilization purposes. I have had Kay's since October with a 3K limit, and just this week added Jared's for 3K. Of course, it really is the same CL (you can't max out both), but it reports separately.
I also have Jared for $2k and I love that it reports separately. I would NEVER buy $4k in jewelry anyways.....lol. I bought my DD3 some screw back earrings and got my sister a pair of earrings for Christmas from Jared. I got the 90 days same as cash deal so no interest. YAY for Kay and Jared!!