I tried to buy the Laser Fibre constant pull Quantum TT Eco. I ordered it, was shipped but then sent back to Laser Fibre. They offered to send me a new one with upgrades (Premium Clamps). I accepted the offer and they said they would ship it. All this time they had already charged my credit card. A month went by after being told it would ship and I never heard from them again. I called, sent emails, left voice mails letting them know i was disputing charges...nothing, not a single response. So I like their product but they have NO SERVICE. What do you guys think of the Eagnas Logic 90. Looks like a great knock-off with a better price. I've never strung a racquet before but I like the idea of the constant pull. I don't really want to spend $800 for a string away either. Thoughts, options welcome.