I have a 110V system which takes 30-45 minutes to come up to mash temp and again to boil. I mostly do 3G batches these days so heat up times are more like 30 minutes. I've never used a 240V system personally, but from reading reviews the heat up times are about half that of the 110V systems. Personally I like having a little time to get things cleaned, etc but my overall brew day length ends up being closer to 5-6 hours. I also vorlauf about 3G on average and sparge which both add time as well.
I have the pump-less 110v model of Mash and Boil as well. Never mashed with a pump so I don't know what I'm missing there, but it works well with just manually pouring wort in the pipe over the grain. It also has both 1600 and 1000 watt element settings - which keep the mash temp swings to a minimum. You bring it up to temp on 1600 and then drop to 1000 to hold temp. Flip back to 1600 to come up to boil. It always takes mine about 45 mins to go from room temp to boil. Maybe 30 mins from mash temp to boil. I've learned to go wash and sterilize stuff while it heats up and it doesn't seem to take so long. Testing the temp with a thermometer during mash has revealed that the fluctuation shown on the display is not actually varying that much in the mash. I played with compensating the temp settings some and then came back to just setting at the prescribed mash temp and let her go.
If I could change anything about the M&B it would be:
Locate the display where it can be read more easily. If you locate the unit near the floor so you can stand there and easily sparge with the pipe raised, you'd have to get on your knees to see the screen. If you elevate it for easy screen access, you need a step stool to pour in the sparge water. Maybe a remote control screen add-on that connects with a cord or some kind of phone app bluetooth thing.
It'd be nice if it was a couple inches deeper to accommodate a false bottom and still allow the whole mash pipe to fit down in the unit.
Stepped mashes are a pain to manipulate manually and wait on so I don't do em. It'd be nice to program that in and let it handle it.
Grain capacity claims 16lb max. Most I've ever tried is 14 and that was tough enough to stir. Don't want to try 16. There are 5-gal big beers that you can forget about brewing in the M&B unless you want to split them up or go back to extract.
All-in-all, it's a good solid unit and makes good all-grain beer for a reasonable price. I picked mine up on a Black Friday deal on Amazon for $249 + free shipping. It's relatively easy to clean. You do need to disassemble the spigot and clean that well. Watch the parts closely when they come out. There are 2 thin oddly shaped directional gaskets that go on either side of the ball in the valve. You have to turn the unit off and stir like hell when you add extract because it scorches pretty easy over the element. Watch it closely and don't leave the lid on when it comes to a boil. Well timed stirring usually settles down the foam pretty quick. Some of this is true of just about any electric unit.
The Anvil system looks good too. Especially their screen positioning. Surprised their 10.5 gal unit is rated at only 16lb. I've heard of issues with early Robobrew units, but I think that's worked out now. I'm just gonna brew with this until I either kill it or come across something else I can't live without at a reasonable price.