First 70.3 in 20 years so thought I'd get a new high tech suit. My height is 174cm, 69kg, chest 90cm, waist 77cm and hips 85cm, so according to their guide I went for an XS which fit snug and was fine throughout the 70.3 event. Felt a tiny bit tight under the arm pits but I did use a bit of body glide so no issues and I didn't notice any discomfort during the event, but size up if you don't like tight fit, but don't leave any Watts on the table. Suit feels very areo. Pockets felt quite good but I used the 2XU race belt to hold a few gels.
Only used for one practice swim and one 70.3 so far so time will tell how it holds up.
Fit is tight so I suggest being careful when putting on and removing to avoid tearing any seams.
I also got the 15% welcome discount so was great value.