I have a Roadsmart 2 on the rear of my MT09 Tracer - it is the closest match to the Japan only D222 tyre fitted in the factory.
It's a good tyre for my use, tested on a 2000 mile trip to the Vosges & Burgundy in France. Grip well in the wet and dry. Hopefully last a long time as they have deep tread grooves.
I wouldn't use them on a track day on a super sports bike - they are a high mileage touring tyre.
I have used Michelin PR4 in the past and they are very similar in performance terms. Time will tell if they offer similar mileage.