Hence, I'm sharing my experience so others can give it a go too.
But when I got to Everett Station, I decided to go all the way by bus. I thought I'll get as close to the Outlet (Everett Station) and UBER there, which would be cheaper.
So I bit the bullet and decided to try the public transport. UBER or towncar services were est $125 & $195 respectively, one way without gratuity. Shuttles while prices are reasonable, there is a timing and drop off may not be downtown Seattle (a drop off cited was SEA TAC). Driving is out of the question as I'm not familar with driving in the US. I'm a female solo traveller and I searched forums for how to get there. There were good buys but you need to really find them. I gave an average as it has the usual brands (not as many as other outlets), and the discounts were not as attractive as I recalled.