Well, I must be the only one here with an Anaconda that actually has been Mag-na-ported.
I had it done to mine about 8 or 10 years ago.
Yes, it reduces recoil but it's still a good hand full.
You don't want to stand next to me when I fire it, but it's not bad for the shooter.
Anacondas have gone up in price, but mines not a safe-queen, I bought it used and I shoot it. I think most people would see the porting as an improvement.
Would I do it again? Probably, but there are problems.
#1 The hot gases being ported near the front sight have a tendancy to discolor the Orange plastic insert in the front sight, and
#2 the pressure venting also brings with it powder residue and a build up of lead around the ports. Hard but not impossible to clean off the smooth finish of the stainless barrel and around that lovely raised rib.
I'd ask them to either port it a bit further back on the barrel away from the front sight, and/or have them angle the vents more away from the rib and top of barrel.
I also purchased a set of fancy Hogue wooden grips for it. They really look good, but darn it if they don't make you really feel the recoil. Besides being not a common gun, it took Hogue a really long time to get around to making them. I took them off and put back on the factory rubber grips.
Mine has a wonderfully light trigger, and I'm glad it's so well built because I've shot some reloads though it that I wouldn't shoot again. But I wouldn't sell it for any of the prices so far quoted above.
Try some 200 grain slugs with some HS-6 or HS-7 behind them for a good shooting combination.