Again, "good" is subjective in this case - but when compared to the PH810 or Megoliath, they're all mids - little lows and no highs... Honestly, if you A/B'd one with either of those other cabs, you'd swear that the Ampeg had a blanket over the grill, and was missing 1/3 of it's speakers...
IMO, the SVT810e became a standard like the SM58 did - because they work, are durable, don't cost alot, and are readily available - but there are much better choices available for those willing and/or able to spend more...