Staples would let you see them working before you take it away. Alternatively, comp fairs. The one on Totemham court road has a stand which has lots of tfts, including the latest. was there last sat.he also has a shop outlet and is always there at the fair so you can buy with confidence.prices are much better too. in anycase if any thing goes wrong with the monitor the manufacrurer wil often njust replaceit.