Wrentham is where we usually go. If you're driving from R.I. to Boston, it's pretty much the only place en route. Take I-95 north to Exit 6B, south on 495 two exits to exit 15 (route 1A), left at the light at the end of the ramp, pass under 495, and it will be on your right.
That said, many goods sold in outlet stores are made just for the outlets and are of lower quality than goods sold in the same chain's mainstream stores. This wasn't always the case, outlets started as places to get rid of overstocked items or (usually clearly marked) seconds with minor cosmetic defects, but has been since outlet shopping took off with the construction of centers such as this one. The extent of this varies. You'll be fine with Nike shoes, for example, or with electronics. You may be less fine with other types of clothing.