I haven't had any experience with Cookes, but Sharper Edge has a very good reputation among skaters I know who go there.
I ordered a set of Pic frames from them toward the beginning of the pandemic and I was very satisfied with their customer service - it was a very stressful time for them as everyone was ordering Pics, and mine were backordered for several weeks, but they handled it very well and were friendly and easy to deal with.
I'm considering switching my ice boots from Jackson to Risport, and FWIW I'm definitely planning to go to Sharper Edge for the fitting.