I own a TPU Fusion and a Trident Aegis. I liked the Aegis but it added too much bulk for my liking. The TPU will not add much bulk at all. The only problem with the TPU ones is if you aren't using the stock mytouch 4g charger then you'll have to cut the hole in the case for a charger to fit while it's on. Also if you use headphones that have an L shaped jack then it can be a pain to get it to stay in.