Here is my very unbiased opinion of aftermarket mounts and what I have seen over that last few years and how far they have come.
With the number of skis in the Rad Dudes group and the amount of riding we all do we end up being a very good test base.
So RHaas when he first started making mounts (still using stock bases) we got about 6 sets in our group. All different skis X2s, blasters, Superjets, SXRs, Keith had them in his Q8. 2 sets out of 6 had issues, Robin at RHaas stood behind everything and replaced full sets if even just 1 of the 4 had an issue. Now this was like 4 years ago. RHass took all this feed back and came back out with the new billet based mounts.
The new sets now with the billet bases have tons more contact area and are truly bombproof and still carry the life time replacement warranty. No issues on these new style.
701 came out A few sets got into our group. Set in an Aquabot lasted 1 ride. Then they were replaced and the same thing happened. Then 1 set the serts all just pulled out. So we where at 100% fail rate for the 701 mounts we saw. After a few freeride events and hearing people having the same issuses with the 701 mounts. We just got away from them. I have heard they were on their 4th version so I'm hoping they improved from a 1 ride life cycle.
Cold fission. Now I know others have had issues but I can say I never have. Other then feeling maybe alittle more vibration than other mounts. The cold fission we have ran have been great. No issues here.
The TC freeride guys had a Rickter they added a 5th and 6th mount to by adding wings to the stock plates and adding 2 more mounts on the rails. Very cool setup.
You nose a ski in the sand from 10ft there isn't much that won't break. But I will say I have seen skis hit HARD in the sand and the newest RHaas mounts still be perfect. And with a warranty policy of replacing the whole set if there's even an issue with just one! That's why we sell them on our site.