Honestly, nothing to rave about ... but people from outside US wonder what flying first or business class is like domestically within the US.
With the exception of transcontinental routes such as JFK to LAX, or JFK to HNL (to Hawaii route) .... those routes have lie flat beds, the rest of the US domestic first class travel is simply just in recliner seats.
While not the best, at least it is better than the domestic European first class where its not even a true business class cabin.