not worth the price, but you might not want to use electrolytic or ceramic, i don't have any empirical proof that they sound bad but it is a consensus among audiophiles that ceramic caps may sound harsh and electrolitic may sound muddy but your pedals are loaded with either one, the other, or both so unless you want to tear down and upgrade all your pedals as well it probably isn't all that important to begin with. any metalized film or polyester film cap should be fine and are perfectly affordable though not quite as affordable as the ceramic or electrolytic caps that they use in pedals and solid state amp.
you are better off choosing the right size cap that makes the tone control usable than to buy an expensive cap.
as far as fancy multi-cap tone circuits go, well in the sense of a low pass filter it makes no difference to the math, the output will roll off at the frequency that the impedance to ground is less than the impedance of the pickup. but as far as resonant peaks go it does make a difference. is it better? no actually i think after some testing i prefer the traditional tone control or atleast a variation of it. the idea of dropping the resonant peak is to sorta emulate a hotter pickup and get that midrange hump, you really don't need 20 settings for that, 2 is fine. and getting that midrange hump on a single coil won't really give you the proper p-90 growl. the coil is too different.
a traditional tone does a better job of cutting the upper harmonics without making some midrange frequency overbearing, i add a 4.7k resistor in series to the tone (like the fender grease bucket control) as well to prevent it from becoming a grounded cap and giving a strong resonant peak. what i find even better is a lawrence q-filter which inserts an inductor as well so the presence is retained but the icepick frequencies are cut but it doesn't make much difference in a dirty sound that will likely cut the presence anyway. but inductors are more costly than capacitors, still a q-filter costs less than the period correct capacitors.