Leasing offer for Seat Ibiza (at Sixt)

Hello, I would like to lease a Seat Ibiza 1.6 16V Comfort Edition 5-door with 77KW/105 hp (Super lead-free). Since I still did not have my own insurance and could only take over an insurance with SF 1/2 (140 %), I would be interested in the offer with Sixt with the flat-rate insurance. (Since this seems to be much cheaper for me) I have added extra equipment and come according to Sixt to a list price of 18.33€ (incl. VAT). on 54 monts and 10,000km of mileage per year (in case of mileage billing) I get the following conditions: Advance payment of 20% of the list price = 3666€ (including VAT) Delivery/approval costs = approx.800€ (including VAT) monthly rate = 249.92€ (including VAT) The monthly rate is inclusive of all-inclusive package insurance (from Sixt), which is 89.25€ (including VAT) per month alone, including maintenance/wear and a protection against small damages that reduce the residual value would not be able to repererate because of the same retention (= FAirbag Plus). So, now to my questions: 1) Do you think that this is a good offer? Or do you think I get away with another (serious) supplier or with a dealer even cheaper? 2) Are there other costs besides the costs of taxes, petrol, tyres and any repairs, if I don’t drive more than 10,000km per year? 3) Does anyone know if you still have any problems with Sixt? a little bit? (I don’t actually assume, but you never know *g*) Thank you for answers and help! Sirstepfen