The original ARV was intended to replace the C152 and had an odd engine which had a design fault. The co went bust, but the engine was sorted. The rights were transferred to a co in the US(?) which sold kits and several UK examples were reengined with 912 and even a mid west. I understand the airframe is good and it is nice to fly but fuel capacity and useful load are poor. UK aircraft are operating on LAA permit’s.
More info and UK owners at;
http://sites.google.com/site/flyarv/
Rod1