I have the BM 558 and I think it is a fine knife. If you do a serach, some do have chipping problems with the blade but they tend to go away after a while.
Pros:
Light to carry
Smooth as silk to open/close
Great grind good slicer
S30V last a bit longer then other steels
Cons:
S30V can be "chippy"
"Pain to reprofile"
A bit expensive compared to others in the same price range.
I personally don't carry mine anymore, but it has been sitting in my backpack. It has been replaced by my Spyderco Caly3 G-10 in PE Vg-10. I would take a look at the Caly3, the new FFG Delica 4 in G-10 (Full flat grind) and also the BM/HK 14210. Also, take a good look at the other Mini-grips such as the standard in 154CM,the new HG minis as well as the Cabellas Mini-Grip in d2. The S30V is a great steel, but some feel that the extra price doesn't really justify the additional cost.