So far, so good. I use this with a Lumix FZ300 and a Lumix G5. It appears to work in TTL mode with both cameras, giving well-exposed results with either. I had a few questions about this unit before purchase, only one of which was answered, so I'll answer them here for others: As I said, the unit does appear to work in TTL mode with the FZ300. The unit does tilt-down (-7 degrees) to help when shooting macro or close-up photography. And finally, this unit does NOT feature a modeling light, which again would help when shooting macro/close-up. However, I've found it to be a very good flash so far. It's compact, lightweight, requires only two AA batteries (I've been using NiMH rechargeable), seems to cycle quickly and has the flash head zoom feature, which emits a low volume, high-pitched sound while zooming. The sound startled me at first since it almost sounded like an alert "beep," but I quickly found it to be coming from the zoom mechanism. Not objectionable, but worth noting. The zoom feature can be disabled at the touch of a button if desired. Many other features I haven't yet tried, but TTL mode was the most important and that appears to work. Comes in a really nice pouch with a slip-on diffuser (that fits in the pouch). I'm happy with the purchase and would buy it again.