I’m in the this will turn out fine camp. Design-wise it has a sort of fantasy castle look to it (if you squint a bit) and why not it’s a hotel, no reason it shouldn’t be something a bit unordinary. Also, while the materials are everyday, I don’t get the sense of cheapness that others do.
Looking at the bigger picture Porter Sq needs a serious re-imagining, and 371 helps to move things a bit in that direction. Of all the squares in Cambridge/Somerville it's the only one that has a suburban shopping center with a sprawling, several acre parking lot at its core. Even though the businesses there are popular and successful it's a very poor substitute for a real "downtown." Oh, and BTW, there also happens to be a Red Line train station and a commuter train stop right across the street!