@Errol , that's an honest and bang on review mate. My love for the Harlequin actually stems from the one Vintage razor that I am a huge fan of - The Gillette Goodwill. Having shaved with that awesome Gillette in the past, I grabbed a Harlequin head on discount. I'm not a fan of Yaqi making their razors look like bling often as in the over polished ones and neither was I attracted to the original handle so stuck my Razor head on a Stando Svarga. The first shave with a Wizamet Super Iridium had my full attention as I was sure after a few strokes that it would bite but it was efficient and I got away with no damage.
Over the next few shaves, I fell in love with the Harlequin head and discovered that the Gillette Blue Swedes and even the Personna Lab blades worked well in it for me. I always get a two pass BBS with a touch up or two thrown in. It isn't a razor I would pick up everyday but every third day and it's perfect for me. I didn't have any issues with my threading on the top cap or the handle end but having said that, consistent QC issues need to be dealt with as far as Yaqi is concerned.