Stayed here recently (April 2014) - here is my review as posted on tripadvisor. Bottomline: we loved our stay and would love to go back!
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I used Marriott e-certificates to book two rooms for one night (Saturday night) for our family of seven (2 adults and 5 kids) to stay here on our trip up to northern Europe. Check-in was quick and easy - and the staff was very friendly. At check-in, they provided me with a voucher for our family to use at the waterpark next door (I wasn't expecting this - I thought I would still have to pay something to use the waterpark (which would have cost our family about $150); it may have been inlcuded as this was a weekend - or because I have status with Marriott (Gold) - or maybe every guest gets it - I'm not sure). Whatever the reason, the waterpark was great (it was the highlight of the entire road trip for our kids).

The rooms themselves were fabulous. We had two connecting rooms; both very clean and comfortable. Beds were great!

Interenet was fast and I had no issues.

Parking was 29 Swiss Francs - and the parking garage was incredible (I'm usually not impressed by parking garages - but this one was great)!

We did not eat the hotel restaurant (18 Francs per person for breakfast was a bit steep for us). We opted for some bread/pasteries at the Coop/gas station up the street.

The location of the hotel was great for us. It is outside of Basel - so don't expect to be able to walk out of the hotel and see the city. However, the hotel did provide us with free transit passes to use during our stay (the train station is right by the hotel - and it's an easy ride into Basel).

Will I stay here again .... hands-down YES. The Marriott Brand has never let us down and it exceeded our expectations once again here in Basel!