This is not a multi... But Forten Sweet 17G in white is a great string and really has that almost gut like feeling... really impressed and it is really a great deal in reels..
Agree - Forten Sweet is a soft enough syn. gut (SG) that it can work as a more affordable substitute for some multifibers. Perhaps worth a try in both 17 ga. and also 16 ga. to see which one offers a better combo of feel, performance, and service life. I often like to use a 17 ga. SG for the feel I get with it, but I'll switch to the thicker 16 ga. if I need a little more durability or firmness - often the case in the summer heat.
In general I've always preferred syn. gut to multifiber for my own racquets. I prefer the somewhat softer layout I get from my flexible racquets paired with strings that aren't too stiff. As long as it's not installed at a terribly high tension, I can always count on syn. gut to deliver moderate softness, solid playability, and rather high bang for my buck compared with multis.
While a multi can typically be counted on to be relatively soft and arm-friendly, I've found that it will usually soften up after a little use. That means that it goes too soft for me before it snaps unless I install it at a higher tension where it's going to be uncomfortable for its first couple of sessions. It's also a relatively expensive string type compared with most syn. guts, which give me better play for more hours before breaking down. Alpha Gut 2000 seems to be a lower price multi that doesn't break down as fast a some others in its price range (like Tecnifibre E-Matrix, at least in my experience).
There are more durable syn. guts including Prince SG w/Duraflex and Gamma SG w/WearGuard, which use a stiffer material for an outer wrap to give that string some extra toughness. These can play a bit too firm and "clunky" for me, but I can count on many other syn. guts to deliver a moderate degree of softness along with decent feel at a great price. Lately I've been buying reels of Kirschbaum's standard (not premium) syn. gut from TW at around $35 per reel and have zero complaints with it.