I just saw this today. seems like a good port. I'm going to get after my finals are done.
Well sure, a 5 year old phone will lose most of these performance comparisons against modern phones, but will it lose badly enough for consumers to care?
Note: this is a paid subscription service with a 7-day trial. $1.99 USD/mo.
Personally I don't care about this since apple is adopting rcs next year. But its a great thing for people who want iMessage.