No, it certainly is not a good experience, especially as whatever definition of "infrequent" ebay uses seems to be rather ill-defined these days. We've seen numerous cases where sellers have been using ebay for years to have a periodic clear-out of their wardrobe or garden shed without any problem. But then without warning their funds are held when they do exactly the same as before and ebay decides this is 'risky' for some reason.
We should question why, when ebay says that delivery confirmation or positive feedback received can over-ride a Hold, is it so frequently the case when one, the other, or both can be shown, does a seller get a blunt refusal to release funds?
We've even see some absurd cases where a seller has been "returning" or "new" and has been paid normally for weeks/months and for numerous sales, but again without warning, will have their payments Held.
@cobwebcottage It's not really true to say "The only delay is for new or infrequent sellers.." as selling an item significantly more valuable than the sellers norm can also trigger a Hold.
As can a rapid increase in the number of sales.
Looking at the "Help" pages, there are so many "mights", "could's" and "maybe's" that it's nearer to the truth to say that ebay can put a Hold on funds at any time, because even without bringing any of the above into play, ebay can still manufacture a 'need' to hold funds by telling a seller they need to re-verify their personal or bank details.
Personally I think that the uncertainty of being paid in a timely manner is an important reason for ebays loss of popularity with private sellers as it's mostly them that have to put up with this treatment.
