In our experience, the product performs really well when interfacing systems with ERP's through SQL server database tables, but we've even made some interfaces with the web service functionality included with the magic xpi integration platform. Also, we've made some SAP Business One - SAP Business One interfaces, for copying information from one company to another and even between two different ERP systems.
BizTalk is well suited as middleware. Where you wish to translate an input file into an output file and send it to some endpoint. In our case, we used it to convert and send files to SAP. In many ways, it very flexible, and you can do almost anything you want with it. In many ways, it's a better solution than your SAP XI or PI as middleware, since it's much less expensive, and allows you do interface with non-SAP systems.
It is very user friendly. Users can change rules during run time and change workflow.
Huge capacity for queueing messages. It supports all types of adapters like Oracle, Salesforce, SMTP, FTP, etc. Also users can built custom adaptors.
If users want to dynamically deploy their solution without any downtime, this is a perfect solution. BizTalk will be a good fit, especially for public-facing websites.
Well-proven in the market. I used it when developing a website for Virgin Trains, catering more than 800K user requests per day.
Although the scenarios may be online, the main service usually freezes and the processes can't transact any data. With a single restart of the service, the processes will be functioning again.
The support for more applications would be nice, even though there is a nice number of them. Most of the main applications in the market are supported.
The licensing for the software may be a little confusing; you can't buy individual licenses as they come in packages of four.
BizTalk Server has been supported for more than 15 years. It is well proven in the market. Microsoft has provided excellent support with technical issues.
Honestly, we have only used and evaluated magic xpi/xpa platforms because of the recommendation of our SAP Business One main supplier, who has previously used the platform for their developments. So far, we have no regrets with the acquisition of the platform and we are very happy with its performance.
BizTalk was selected here mainly because it is easy to integrate to a .NET application (most of them are Web Service, WCF SOAP, WCF REST and Web API) and many backend databases are Microsoft SQL Server. Another benefit is that the monitoring job is easy to set up and centralize with other .NET application monitoring jobs.
The implementation time for this kind of projects has been greatly reduced.
Certifying an In-House resource in the Magix xpi and xpa platforms is probably the best option, considering all of the projects that can be developed in the future without the need of an external consultant.
The processes that have been automatized with the Magic xpi platform helped reduce human error and the time those processes took to finish.
A positive impact has been the quicker turnaround time of a part request and that part showing up in SAP using Biztalk as middleware.
A somewhat negative impact has been the somewhat insufficient error logging/message capture settings that Biztalk provide. This has caused occasional delays when attempted to create parts for the business.
A somewhat negative impact has been the need to have a specialized developer who understands Biztalk to troubleshoot issues with the Biztalk and SAP interaction when creating parts, and when adding new fields to the parts.