It would be interesting if someone put together a thread comparing the costs of each service doing everyday things - depositing, sending, converting. People might be surprised at how quickly it adds up.
From my experience If you're in the EU area with a Euro card and you stick to buying things from local shops or online shops based inside the EU area so no other bs fees get involved the cost is not that high.
Right now I have an exchange rate of 9468 compared to 9593 at Bitfinex and 9625 at Bitstamp, that is around 1.4-1.6% , you lose another 2% of the exchange from
BTC to euro, probably more if you do it in small batches as I can't figure out exactly what this commission is as it obviously has a minimum (not specified on their webpage). I tried for fun to exchange 50 cents of satoshi and the preview page shows a 25 cents fee, tried with 25 it dropped to 12, 100 euros is 1.5.
But overall it's not that much, the problems start if you try to use it outside the Euro area, one on top of others add up pretty fast to almost 5-7.5%.
Oh, and another thing, pretty weird.
I tried in Hungary last year both cards, the USD and the EUR.
The USD card had a fee of 60 cents/10 USD, the EURO had a 0.40 cents fee for 13 Euros, same chainstore...no clue why.