It's a well proven robust design with great support behind it. Parts will be available for a long time, as well as service centers that will fix it. Hobart=Miller (for the most part, yes I know different factories, etc). Longer warranty too.
It's also a very smooth welder (good arc characteristics) for a 110V machine. You won't be fighting this machine when you are learning.
I was also very tempted by the Tweco 140i. I decided against it because of the higher price, and the fact the fact that 3 in 1 machines you probably won't ever use for the 3 separate process.
A TIG set up is another $130 for the torch, and another $200-$300 for an argon tank and a flow meter (the regulator that comes with it is not adequate for TIG). Are you prepared to spend almost as much as the machine costs for the TIG function? Yes an argon tank can also be used for MIG aluminum, but with a 110V machine, you are limited to a very small range of aluminum that you can weld (about 16/14 gauge), so it's all a waste for it. Not to mention the spool gun is an additional $300 on the cost of the machine.
The stick function is also only DC+/- and there is no AC.
TIG on a 110V machine is also kind of useless (ignoring the cost factor). TIG can take a lot of power to weld (it's not like stick or flux core where the burning of the electrode/wire adds a lot of heat). Very limited in what you can TIG weld. And again, the TIG will only be DC+/-.
So you're paying $600+ for a machine that can MIG weld, and then also stick weld out of the box. TIG and spoolgun/aluminum functions you will spend nearly the same amount as the machine to get. Shorter warranty.
I'd rather have a dedicated MIG welder and a dedicated stick welder that can do AC, DC+/- rather than a machine that does MIG well, only DC stick, and is super expensive for adding TIG.
3 in 1 machines are much more useful when they are a 220V class machine. 110V multiprocess machines just aren't worth the price, as they are pretty limited in what they can actually do.
The hobart 140 is a well proven welder. It'll work great and can be had for as little as $430 or so from Zoro on sale. $170 saved means you can get a welding helmet, some welding gloves (Tillman Elkskins are my favorite, still stay supple even when heated up to high temperatures), a welding jacket, a 3M respirator (I got a low profile with quick release so I can unlatch it, say something, relatch and keep going ....
http://solutions.3m.com/wps/portal/...=5548558+8690968+3294134204+3294529207&rt=rud) and maybe even a Harbor Freight welding table.
You'll also need money for angle grinders and consumables if you don't have that already. The extras for welding soon equal the cost of the machine sometimes!