I was thinking this the other day. For me it was worth it as the only things about the jailbreak I miss are RetinaPad + Fullforce and SBSettings. I think it really depends on how much you like/need all the customization. I find iOS5 safari browser much much faster. No more pixelation when scrolling web pages. Also split keyboard works really well for me. Can't recall if there was a Cydia app for this or not though.
I had to do a restore after Apple stopped signing 5.0 so am on 5.0.1 on my 4s which is nightmare after reading the devs are working on a jailbreak for 5.0 and have said not to update to 5.0.1 😡
I had to do a restore after Apple stopped signing 5.0 so am on 5.0.1 on my 4s which is nightmare after reading the devs are working on a jailbreak for 5.0 and have said not to update to 5.0.1 😡