Simply Eco became Simply the best . They priced well for a Worcester Bosch boiler upfront and clear; no hidden costs or arguments like some contractors out there. I had the upgrade done from a gravity system and was able to keep tank and pipes for scrappage value. The conversion from Tank System to Combi cost a bit more but is more economical long term. The installers were helpful and worked quietly; they did a good job pipes they were well laid out. They cleaned up as well and took time to explain the new system. Thanks