I bought the one off of e-bay and had mine on for several months before it cracked at the base. If you do an earlier search you will find my post about it. Taked to the guy who sold it to me and he said that they have been re-inforced at the base so it should no longer happen. I opted for a fixed spoiler from the same seller. He replaced my broken one for free and I sent him back the broken one. You can even see my rear he used to sell the fixed spoiler on e-bay. Eagle Day also sells the exact same spoiler. If I ever buy the Zeintop hardtop I will want this type of spoiler in combo with the hardtop because the hardtop requires you to remove the rear trunk lid which would in turn remove my fixed spoiler. So to answer your question, yes! It is a good manufacturer of that spoiler and should be fine to buy from them. Like I said Eagle Day also sells the same spoiler.
http://eagleday.stores.yahoo.net/boae.html 