8S upgrade to 12S module?

Has anyone bought this and does in need a bigger LCD screen to work correctly?
Also, are there any down sides to doing this? I have already added the nrf240l and A7105 module upgrades with 4.0.1 FW with excellent results, not sure I really need this upgrade, but it sounds good.

WALKERA TX Upgrade Module DEVO8-DEVO12 (upgrade to DEVO 12S This is the module I am asking about on miracle-mart's web site. Other than just seeing on there I don't know much else. There isn't any info or other description. I am wondering if this module will be ok with the smaller screen of the 8s and if it really is worth doing. It's $9.00, but out of stock right now. If anyone has more info I would greatly appreciate it. You know what they say, "more is better"

Thanks for the info, I did see the same module for $25.00 somewhere else, but if I don't need it then good. Just like to add, I have had no issues with my 8s at all since the upgrade. You guys are doing some awesome work here. A BIG Thank You!