Product review (4 stars): Half the price of GE filter works great
I installed the filter fairly easily, but couldn't find the arrow indicating the starting position. If it was there, I could not find it. After several attempts, I put it side by side with the old filter, and marked the arrow location. After that, it was still a little hard to turn, but it locked in.  I'm totally satisfied, and recommend this product. If not for the missing alignment arrow, I would have given it 5-Stars