Sig Sauer pistols are decent, high quality service weapons.
They are grip dependent in the respect that the trigger bar spring must be held in the proper position for normal functioning, so the proper grips must be used.
They must not be fired without sufficient lubrication, though.
In my armorer class we were constantly reminded that Sig Sauer pistols are 'wet' guns, and that 'seeing & feeling' the lubrication in the necessary locations is important. It was even a fill-in-the-blank question on the written test.
Here's a link to the Sig Sauer Customer Service website, which contains some excellent information in both printed guides and video. Check out the video links.
http://www.sigsauer.com/CustomerService/MaintenanceGuides.aspx
.pdf guide:
http://www.sigsauer.com/CustomerService/documents/PREVENTMAINTGUIDE.pdf
The choice of traditional double action or the enhanced DAK double action is an individual choice. Personally, I prefer TDA designs, but the DAK has become popular with some folks.
The primary trigger stroke of the Enhanced Double Action Only (DAK) requires approx. 6.6 pounds of pressure to fire the trigger, and it's the 'full length' trigger stroke of the two ...
The intermediate trigger stroke requires a partial reset of the trigger, and a heavier (approx 8.3 pounds) amount of pressure to fire the pistol.
Granted, the primary trigger stroke actually tends to 'feel' lighter the 6.6 lbs to many folks because of the excellent geometry of the design ... but it's long, too.
When I asked an armorer instructor during my Sig Sauer armorer's class why the shorter reset trigger stroke had to be heavier ... since that's not generally the way of it in TDA pistols ... the answer given was that it was Sig's determination that it was 'safer' to have the shorter trigger stroke require more effort on the part of the user/shooter.
The armorer manual lists the TDA P229 trigger strokes as (approximately) DA - 12.12 lbs & SA - 4.4 lbs.
If a Sig Sauer pistol were issued to me as a service weapon I'd have no qualms carrying it ...