We prefer Xactimate, for a multitude of reasons. Some carriers require it, but other carriers require other software, so you provide what the client wants. That all said, with a few notable exceptionally rural exceptions (like the barrier islands along the eastern Coast and the Gulf or the middle of nowhere, Oklahoma or TX), we can usually find a dozen or more contractors willing to work on Xactimate pricing, which satisfies the questions that are inevitably asked during a dispute on the value of a loss, those being "The policy says 'reasonable cost to repair'. Where is 'reasonable' defined in the policy?" or "Who defines 'reasonable'?". We have found that if one can point to an even dozen willing and able contractors willing to perform a task for a certain cost, that cost can indeed be interpreted as "reasonable", and frankly it doesn't get that far, as no contractor wants another dozen contractors sticking their noses into and possible securing the project that they have closed the deal on. Some systems, due to lower (sometimes ridiculously so) price lists do not yield the same results.
Some platforms are more geared to certain losses than others (Simsol and NFIP flood, for example), but as far as a stand alone platform, we prefer Xactimate. Almost everyone with a reasonable amount of experience is at least somewhat familiar with it, many, many contractors use it (which reduces disputes to scoping issues rather than pricing issues) and overall, the cost at $1,500 per year when compared to Symbility at $15 per claim more or less makes it a winner. I shudder to think of the cost of a banner year using Symbility. At $15 each, a couple of decent seasons could easily run into the 7 figures for some companies.
I would love to see a strong competitor come on the market, but Symbility as currently implemented just isn't it. In addition to the costs, maybe I was turned off by their salesperson that contacted us trying to get all of our adjusters to move from Xactimate to Symbility. I asked the most coveted of all questions that a salesperson wants to hear: "What makes your product better than the one we are currently using and how can it help the company and our field staff?". If I was a pitcher who just left a big fat and slow curve ball just sitting over the plate waiting to be knocked out of the park, I couldn't have set it up better for that guy. It's a question that screams "SELL ME, SELL ME NOW!". The response was "I will have to look into that and get back to you".
I quit taking his calls and stayed with what works.