I own a Kimber Solo and a Sig P938.
The Solo is a beautiful pistol, and mine has been flawless. I clean it faithfully after each outing at the range, and use Militec to lube it. I routinely practice with 115gr FMJ with no malfunctions, and was carrying with Hornaday Critical Defense before recently switching to DRT. I carry it with an extended mag. The gun is extremely accurate, but there is a bit of a bite to the recoil, as would be expected.
I had the Solo about 10 months when the P938 came out. I had liked my P238 so much that I wanted the 938 as well, and to date I have put about 300 rounds through the P938, and clean it also after each use.
Three days ago I shot the two side by side as I was having trouble deciding which I preferred to carry. Put about 60 rounds through each gun, shooting two-handed, strong hand only, and weak hand only. IMO, the Sig is a bit less snappy and settled back on target a bit more readily between shots. I had no malfunctions with either gun. For now, I intend to carry the Sig as primary because I like the 1911 ergonomics, and the Sig night sights, while my Solo has the 3 dot white sights, but not night. Both have the Crimson Trace laser grips.
Bottom line - both are superb, small pistols with 9MM firepower, IMO. I am confident carrying either, and practice with both.