I have no dealings with MacIssac's personally but I have dealt with their Teacher. I have a 16oz, 8 yard handsewn Kilt, crafted by Carol Fitzherbert. Carol is a Kieth Kilt School graduate and went to live and work in Canada to teach the people at MacIssac's the art of Kilt making.

"Through a kiltmaker’s guild in Scotland, the MacIsaacs met Carol Fitzherbert, who agreed to come to Nova Scotia for one year. She stayed for nearly three."
MacIssac Kiltmakers
If the quality of their kilts is anything like the craftsmanship of Carol's work, you're on a winner.