I am just over a week in to my personal journey with the iMamba, and so far I am quite impressed. I have posted elsewhere my initial impressions, but I think I have used it enough now to expand on that a bit.
The iMamba is often compared to a CRK, and I suppose for some good reason; but they aren't all that similar in reality. Sure they are both South African to an extent, both are titanium frame locks, and have a somewhat similar profile - but that is a bit of a stretch really. I think that the iMamba should be taken with it's own merits in mind, the more I carry mine, the less I find it much like a CRK at all.
The action has remained very consistent, I haven't had anything even close to a reason to disassemble the knife (and honestly am not really looking forward to doing so); I have blown it out with a can of compressed air; but everything has remained gunk free and the knife continues to flip fantastically.
I haven't abused the knife, but it has been used fairly extensively to cut cardboard (thin and heavy duty/3 ply), lunch, rope, and plastic and the edge is still shaving sharp. I haven't even needed to strop it just yet, so I can't say that the RWL34 hasn't impressed me. I know that it is essentially CPM 154/Damasteel - which I don't have any analogues to compare that with (I have plenty of 154 CM).
The titanium does seem to be a little more likely to pick up snail trails than my CRK knives, but that could all be subjective - it has been awhile since I had a new plain jane to compare that with.
Either way, this knife is a winner so far in my book!