Trusted Reviews is supported by its audience. If you purchase through links on our site, we may earn a commission. Learn more. Promise Technology Promise Technology SmartStor NS2300N Review Score The SmartStor NS2300N NAS box delivers on the features front, but what about performance? Review Price: £184.48 Promise Technology Dave Mitchell Promise Technology SmartStor NS4300N Review Score RAID controllers and now NAS appliances - Promise Technology steps gingerly into this competitive market. Review Price: £915.33 Promise Technology Dave Mitchell Page 1 of 1