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I think the answer to that would depend on how you source them and what your goals are.
Silkies are generally ideal as pets, not layers. If you do not eat many eggs, then their production might suit you well. They are decent producers (I'd say they give 100-150 a year) but are very seasonal; they produce mostly in the spring, beginning and end of summer, and fall, and tend to quit during the heat of summer and the colder months of the year. They give an egg which is big for a bantam but definitely small compared to a standard. They are of course not any sort of useful meat fowl.
They are also the one breed I always recommend sourcing from a breeder for the Real Silkie experience. There is such a world of difference between hatchery and exhibition style Silkies that I hesitate to refer to them as the same breed. One is no tamer than any other fowl; the other is extremely docile and lovable. One is "kinda fluffy" and the other will probably need it's beard and muffs trimmed just so it can see properly! One is rather... eh... the other is magnificent and sure to gather many second looks. I really see no point in getting Silkies from a hatchery... they have ruined the breed and made it useless, as their stock is no better or more docile pet than any standard laying hen and yet it is still a poor layer!
Then there lies the main issue with Silkies... sexing. They are near impossible to sex as youngsters, and mostly you will only find them as a straight run, or as very pricey adults. Mypetchicken claims to sell sexed Silkies, but I believe their accuracy is only 75% (a pretty poor rate for chicks going for $10 each!). And of course these chicks are hatchery quality, which again, I see no point in purchasing. Most people choose to simply get a straight run of chicks and hope for a goodly amount of hens. Personally I wouldn't get any fewer than 10 to ensure at least a few are hens. They then rehome or cull the cockerels they don't want. Note that it is close to impossible to rehome a rooster, and often takes several months to do. Culling is much easier but many get attached and do not wish to cull birds who were raised as pets.
Beyond that... let's say you find a way to get a few nice pullets for your starter flock... they are a fine breed for a beginner, perhaps even excellent thanks to their docility. Aside from being a bit less tolerant of dampness (have plenty of covered areas in your run!), and a lot less predator wise (a covered and fully enclosed run is a must... no free ranging for these guys), they are just like any other chicken in their care and hardiness.