It's a question that usually gets a very big 50:50 split.
Of course the schools will try and pursude you to fly there because of their "new modern glass cockpit aircraft" OR "we fly old school steam driven analogue gauge aircaft to make you a better pilot".
In the 21st century it makes sense to use something a little more modern, even the modern driving test requires you to use sat nav on the test.
The best people to ask are the airlines, they're the once who could probably give you statistics on how many people pass sim assessments and type ratings with the least problems and compare them to what type of training they had.
Personally, I have always argued that I prefer to learn on something a bit old and dated. Learn the hard way, then allow yourself to ease onto something easier once you know what you're doing. That way you learn proper hand flying skills whilst building a good scan. If you were teaching your child how to multiply, would you teach them their times tables, or give them calculator straight away?