DSG or Manual - one of the topics that crops up periodically on many VAG forums, along with premium unleaded v’s regular unleaded petrol, leather v’s cloth upholstery and (but less frequently now) petrol v’s diesel.
As @watts has said, there’ll be many opinions on the merits (or otherwise) of DSG compared to a manual transmission. The only way that @martin998877 can really decide if a DSG GTI is right for them is to try and arrange an extended test drive. That way they’ll hopefully be able to drive and evaluate a DSG equipped GTI under a variety of different conditions and on different types of roads and compare it to their existing manual GTI. However, with more and more of the country moving into Tier 4 Covid-19 restrictions, an extended test drive might not be easy to arrange just now.