Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,181
Unless there is a specific IB+ transfer bonus, you can just move your US Membership Rewards points to British Airways or Aer Lingus.
Now that surcharges are the same for IB metal via ba.com, there's little reason to be using IB+.