The size and illumination is optimal for my Fuji-XE2. A good complement to the internal flash. Tried it in the living room and found virtually no difference to the internal flash. The Nissin images were illuminated minimally brighter. Tried it with ISO 3200 and ISO at 200. Both results were about the same. To use: Simply explained and easy to use. Somehow also self-explanatory. For me, but not necessarily. If desired with a little more extensive than Bedieunungsanleitung a leaflet. Now I do not know when to and when to use TTL Auto. This should be for lay people who have never used a flash, to write. Otherwise, I am very satisfied. Will use the flash in any case at the next celebration. Is indeed relatively small and equal stowed. Ordered for 180 lightning at Hertie Online Shop.