Melissa
I'm a light user. I don't store a lot of media on my phone, and don't play a lot of games or watch a lot videos. I keep my media on here (music, photos, docs, etc), and backups. I don't notice much of a lag. Any lag I do notice (maybe every couple of months) I attribute to the phone, not the card. A shutdown and re-start usually solves that. Great to have, and way more space than I'll ever use. If you're not a heavy user, you may not need this much storage space, but for about $20, why not just get it and know you'll never run out of space.