To Flexi seal or not to Flexi seal

[jrtrrror]

I've bought an MX Flexi seal to fit to my new shower tray, but after reading more reviews, Im thinking it may be a poor choice.
Do you guys even fit them to your trays or do you not bother and simply silicone around the perimeter of the tray(the gap between the tray and the walls)
If some of you do use a seal strip of some description, which would you recommend?
Ta

 

[Ben-gee]

No, if included I always throw them away. Why introduce extra surface interfaces, each one is a potential leak, silicone between tray/wall. Then finish walls and silicone between tray/(tiles/boards/whatever)

 

[jrtrrror]

Why introduce extra surface interfaces,

That makes so much sense to me. That's why I was having second thoughts. Thank Ben Gee, again.