Yeah, IME, the XR55 was not amazing, but I think I considered it a good starter unit because inexpensive receivers (until very recently) were absolutely terrible. 100 watts of power from a receiver was hard enough to find...they all claimed 100 but only HK was coming close.
Another piece of gear I bought solely on reviews that underwhelmed me was the AR1P ( I think ) outlet power conditioner. It MAY have made an audible improvement, but for that price and considering it had fewer outlets than a Panamax or similar unit, I'd expect noticeable improvement. For some, paying $400-500 for a simple tweak may not be a big deal, but don't claim night-and-day differences with such things in reviews and I won't expect so much. Ok, so I realistically didn't expect drastic improvements, but it certainly didn't do what reviews were telling me it would.