mine cost around £200 sold as janspeed but probably very simliar to the other budget kits of that price, i dont adjust it ever week or even month, i dont do track days, i just wanted stance and tighter suspension, original stuff leaking ect.
if my car was abit more "mint" like a show car ect or i was making adjustments alot, like doing track days i would certainly go for the more expensive kits.
Also agree with G60 top mounts along with my cheap coilovers the suspension is tight, where as before i seem to have alot of movement in the top mounts.