Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent workouts, excellent value

I'm English, and wanted to add some American DVDs for more variety to my daily home exercise routine; I must admit, I chose pretty much at random from reviews, because to me it's "Billy who? Tami what?" Mostly, I picked well (thanks reviewers!) and here I picked extra well: I love, love, love these two DVDs; it is *amazing* how effective such teeny, tiny movements are. Ouch, though. Big ouch (in a good way). BTW, I have a chronic back problem and rheumatic knees (I sound 70? 38 actually, so no bendy young thing), and I don't have any problems doing these. I'm not saying that would be true for everyone with back or joint issues, I admit I'm pretty fit and that probably helps, but don't be put off from trying.