my wife is wheelchair bound and we have travelled with various cruise lines in the past including Thomson so when we were offered a package including flights at a reasonable price with adapted transfers from/to airport and ship for back to back [total 14 nights on the Spirit we decided to accept.
The ship is tired but perfectly adequate , the staff are brilliant , the food is ok [ you certainly will not starve] No disabled cabins were available and the port of Pula was a tendered landing but we knew this prior to booking hence no complaints.
no our gripe centres on where they land you , how far away the town is ,and no disabled transport to and from the advertised town.
Just managed but cabin is really tight for wheelchairs