I popped into the local Tesco at lunchtime to grab a sandwich and noticed they had an end of isle display with a couple of Hudl 2's. Had a quick play and unfortunately came away disappointed.
The display looked fantastic and build quality looked good, but performance looked shocking. They were running some slide show demo software, but you could dismiss it with the "try it now" button and instantly it looked poor. Dismissing the demo software to go to the home screen was a jerky, laggy transition and once there just swiping between the home screens was just as laggy.
It may be the demo software being poorly implemented causing issues, but as a quick experience of a new tablet it was not a good first impression.
This was in the Coventry Cross-Point superstore, but I would guess all big Tesco's will have displays up now.
I had exactly the same experience with a demo unit today. I left feeling rather disappointed after reading all the positive reviews

Is scrolling in Chrome smoother on content-heavy sites like www.theverge.com after changing the launcher? That site in particular performed badly on the demo unit.