The main problem i see with Atlas is the fit and the weight.The best tip as many others say is the e final in that it gives the most balanced sound without dampening the highs like the stock ones.Unfortunately
depending on your ear shape they are better for stationary use as they tend to fall out of the canal very easily and the last thing you want is your $1300 iem hitting on the pavement as you walk.
Other than that Atlas is very worthy of its pricetag as it does everything at a very high level especially the ammount of detail it provides for a dynamic driver and the very beautiful,mellow,full of body although slightly recessed midrange.
Here is a review to help you make up your mind
https://time-lover.com/2018/09/23/o100000-earphone/ (I love the precision in the colouring of the star rating)