How important is quality?

I am always willing to listen to advice, but there is one piece of advice which I have been ignoring. 

Using cheap kitchen, bathroom, fire and flooring in a project would of course save a lot on the budget, but would it sell as quickly?

I believe that in this market, where buyers have so many properties to pick from, that quality fittings are the difference between a quick sale and a property staying on the market.

The market I target is an older market who have probably owned a few properties over the years, and know what they are looking for.  I'm not saying that first time buyers aren't interested in quality but they possibly don't know what to look for, I know I didn't as a first time buyer.

I hate the thought of my buyer tearing out something that I put so much thought and money into, not just from a profit point of view but also because it is so painfully wasteful.

But am I being overly cautious? For example, I put in high efficiency gas fires (low bills) with slide controls (easier use) which both come at a premium, but is it worth it?

It certainly doesn't add value, but does it help to sell the properties, I think so.  

At the end of the day, I won't ever please everyone, but I feel like quality fittings show that the whole project has been done to a high standard.  If the kitchen isn't good quality, then what else might not have been done to a high standard?