Intermedical Homecare are a reliable source for domicilliary oxygen concentrators. The range available seems very comprehensive, and was particularly helpful in comparing and choosing a lightweight device which can be used outside the house during exercise. The ability to have the VAT exemption applied to the invoice directly, rather than pay the VAT inclusive price and then await a refund, is much appreciated. I have found that the availability of accessories, even fairly obscure ones, but mostly really useful, shows that the company has a good knowledge of its customer requirements. The website is fairly easy to access, but I do get a bit frustrated about the need for complicated requirements for passwords to access my account.