The range 18-105mm is ideal for covering 95% of photographic needs (practically only telephoto is left out). With a fixed aperture of f/4, satisfactory speeds are achieved throughout the range. The impressive optical stabilization compensates for the absence of a larger aperture (e.g. f/2.8). Even at 105mm and in low light, I was able to take a clear photo handheld. I believe that the stabilizer gains at least 2-3 stops. However, the stabilizer proved even more important in video. In Full HD/4K videos, I previously had a strong problem with my prime lens because even the slightest shake became noticeable on the screen due to high resolution and frame rate. Finally, the video looks flawless and the zoom/focus is completely silent, even in complete isolation conditions. The colors are very vibrant and the sharpness is good. Regarding a previous negative evaluation of sharpness and distortion, I would like to comment that a zoom lens cannot be compared to a prime lens (e.g. 19mm or 30mm, etc.). There are certainly zoom lenses that combine low distortion, top sharpness, and are faster. However, if anyone knows such a lens that doesn't cost at least three times as much, please post it so I can buy it too. As for distortion, Lightroom automatically recognizes the lens and applies the appropriate correction profile with very good results. The most important advantage of the lens, however, is its weight and size. For its category, it is excellent and pairs very well with the small body of modern mirrorless cameras. This is something that you will see in practice has great value in grip and hand stability.
On the negative side, the focus and zoom rings have a very smooth feel, which is something I would prefer to be different (i.e. have a faster and "strict" response). Similarly, in power zoom, I would prefer a wider range of zoom in/out speeds, as I found it quite "conservative". These two factors limit creativity in video a bit. Finally, the autofocus speed is average and will not fully exploit the speed of your camera (if you have an a6000 or above). However, this did not bother me much until now.
Conclusion: for me, it is the best value for money E-mount general-purpose lens available today. I don't give it 5 stars because the enemy of the good is the best.