I am not a big fan of box chains, but it can be hard to find anything else, especially in silver.  In particular, I wanted something a bit more delicate for a smaller jeweled pendant that I have.  This rolo chain, which is made up of interlocking links of small circles, fit the bill nicely.  I purchased the 16-inch chain, which I think is a good length for a smaller pendant, as it hangs above the neckline of most of my v-neck or scoop-neck clothing.  At a 1mm thickness, this chain seems fairly sturdy; I will amend my review if I notice any chances over time.  One thing I would have preferred for this chain would be a lobster-style clasp:  although I haven't had any problems using the spring-release clasp so far, a lobster clasp is always a bit easier to use as well as lends a more polished look.  Overall, I would recommend this chain (and the seller as well, although I found their shipping costs to be a bit high).