Of course, Chris.
I agree here with you totally. The key phrase in your comment is within reason. Yes, one wants a restorer to take all of the time he/she needs to provide the best results possible, but we have also read or heard the stories, where months and months can go by, without any word, any update and any poster, yet when all is said and done, the work is less than par, let alone sometimes painfully dreadful (siting work/examples done by, Mr Posterfix, as but one example).
Time and artistry don't often go hand in hand. And in that regard, there can then be real and genuine concern, ofttimes.