Only issues i can see are
1: No test access on the Helacons ?
2.Having to cut back and trim if changing etc ?
3: Access if you need to cut a centre cable , There is not a lot of room !
Just wondering if Wago leaver types are more "user friendly" /
years ago..... i had so much to do on a friday night ! Now its paper work and a little internet !
Using the push fit versions i#ve never had to cut and retrim cables if they have reterminated. Just pull and twist and they come off easy.
The testing holes on the Wagos are way too small if you are use the protective tips on your tester though