I recently purchased the Balkan Caddis collection (x2) and the Bosnian Indicator Olive (BIO) collection. These flies are extremely well tied, using top quality materials and are sold, in my opinion, at a very competitive price. What's more they work !! Two friends and I have fished a few evenings recently on the River Usk and the local Usk brownies absolutely love the Balkan Caddis pattern !! I am sure that the BIO collection will work equally well at the end of the season when the main olive hatches on the River Usk resume. I can't wait to try them. Add on wonderful customer service and free delivery on all orders and you simply cannot go wrong dealing with Barbless Flies Limited. Every order that I have placed with this company has been received within 48 hours at the very latest. Can't fault it. Keep it going fellas.