Only i used the ADS ,
ADS is best if some one know it,LVS , DRC ,nodealCHECK, conCHECK,L to S and S to L is available what else you guy's need . Export ability.
Layout is just matter of DRC thats it .
Desige Kit install ability.
No doubt ADS also has capability equals to Cadence Virtuoso .
I think cadence virtuoso is the best option for layout and circuit design , the stability of laker is not good, and it is not the full integrate tools for the full process of design.