To start with, I'll mention the overall shopping experience when buying large household objects. Why can't I browse in a shop alone? Do they think I'm incompetent? In every shop (with the exception of Tesco) at least least one assistant feels obliged to tag along. In Home Pro, I seem to walk around with an army of little helpers. I try to leave them talking to my wife, and break away from the main party, but I think they can smell my wallet (or me - it has been hot) and soon tag on to me again.
When I decide that I want to buy something, I don't think there has been one occasion when they have not tried to persuade me that my decision is wrong, and I need something different. I'm an old man, most of these 'assistants' are young kids. Why would they know what I want better than I know myself? My choice is generally made through years of experience and already having made mistakes. They go to the extent of saying that my choice is no good whatsoever (so why are they displaying it/maybe selling it). On several occasions, I have simply walked away - no sale.
I mentioned Tesco earlier. The only large item I've bought from them has been a fan. We needed one quickly, and we were in Tesco. We chose the fan, loaded the box in the trolly and were on our way to the checkout. Some guy ran after us with a box in his hand. I naturally thought that he's seen us make our choice, and now he's going to try to sell me what I really want. On this occasion it turned out that the fan came in 2 parts, and we'd only taken the pedestal - he was chasing after us with the actual fan

Now the delivery/fitting service. With one exception (incidentally the from the store that has the best reviews on this forum), the delivery/fitting service has been excellent. Very cheap, very efficient and very quick. As an example, when they came to fit our automatic washing machine there was not even a water supply. The guy surveyed the property, shook his head and sucked air. I asked what he needed to make it good. He made a few measurements, wrote a few things down and said that if I gave him 1000 Baht for the bits, he would sort it. He came back about half an hour later, and gave me 410 baht change. The machine was plumbed in very expertly at no additional cost - all part of the delivery service. Yes, we did give him a decent tip. I hear people moan about this shop and that shop, but compared to the UK, the delivery/fitting service is second to none - very impressive, and well done Thailand!
Get rid of the superfluous 'assistants' and IMHO Thailand is a great place to shop.