Buddy of mine, who is since become an adjunct instructor at a well-regarded NW WA training organization (self defense), carried a P229 for awhile. In 40 S&W.
In the end, it wasn't for him: switched to another option, let's not go there to keep focused on the carry vs. the caliber, capacity, and brand. I will say he felt double-stack was a bit wide for certain kinds of carry. I share the sentiment and only do single-stack. But I have carried double-stack: seems a bit too-wide for IWB, IMO, but nothing wrong with it for OWB. Maybe thinner guys have a better time of double-stack and IWB.
My buddy was and is into simple but effective solutions. Kramer Leather is here in NW WA and has a presence at the WAC shows big-time. I've had their products and NO complaints (IWB, for Glock 26, way back when). May wish to take some training using both Kramer (or other horse hide) and Kydex, see if you prefer one over the other. At-worst you've got an extra holster or two, which can be unloaded somewhere for $.50 on the dollar or tossed into a drawer. I tried various options before figuring out what works best for my particulars.
Everything I've had from Milt Sparks, Kramer, and Alessi has been top-notch. I'm sure there are many other good options, too, as mentioned in this thread. Kramer just seems particularly convenient due to their Tacoma location.