They distribute sails from the Rolly Tasker production loft in Thailand. They are reputable dealers and have been around for a long time.
Rolly Tasker builds a wide range of sails, from OEM (aka standard, economy or factory) to premium, which they offer at different price levels.
You generally get what you pay for. If you order a high end, premium sail from them, that’s what you’ll get. If you buy an “OEM/standard” sail from them, you will get an OEM or factory entry level sail.