Good principle but with disappointments

For years, I use a similar keychains, however no longer fully corresponds with only (still) 4 rings my requirements. My decision was therefore taken quickly and this specimen with 6 rings + carbine was bought.

Although me the basic principle still excited I had to take several small disappointments in this product, especially considering my high expectations and experiences with my predecessor.

i) The einzenlenen keyrings are very small and strong, hardly as 1cm diameter (estimated not measured). The threading is thus very fiddly, especially large keys or a thick border around the "eye" are challenges. More like 2 key or even just a bit thicker (car) keys are nearly impossible.

ii) The carabiner, for me the main reason for this model is both too large and too small for my purposes. By that I mean: The web and the ring are pretty thick and therefore do not fit into each eye on keys, on the other hand, the volume and the size / diameter is so small that even here problems. I often go by different cars and wanted to secure the keys so quickly, which previously functioned without problems with another carabiner key rings, it will fit in a single.

iii) to engage the balls not fit my old trailer.

The basic principle is genius and totally practical, the actual implementation is carried out rather inconvenient for me and my purposes. Since not enough me my old 4 rings I'll keep these pendants and key rings and carbines (thus going 1 Rings "lost" because of the carbine is firmly connected to the latching mechanism) replaced.

For the points i) and ii) I take a star from each and come thus unfortunately low 3 stars