Do you have a 14" or 16" blade?

I've got an MS180 with a 14" blade. Because they use a small tooth chain (pico) they don't grab or kick in the same way that larger saws can if you're not careful with them. I like mine a lot but am cognisant of the fact it's designed for home use so don't use it for protracted periods.

When you say "wood bigger than 16" what exactly are talking about?
- branches (downed or in-place)
- small tree trunks (downed or in-place)
- other wood altogether

I've only used mine on downed branches, none of which were any thicker than about 12" (30cm) and it went through them like a hot knife through butter.

Edit: Also, what sort of wood are you talking about? Softwood like pine, sycamore, silver birch etc. or something harder like Jarrah...

I've had one for about 8 years.  Great little saw.  I stuffed my factory chain hitting too many nails when disassembling a rotting deck and went with a replacement Oregon PowerSharp chain https://www.oregonproducts.eu/en/powersharpr/what-is-powersharpr.html which works well for me.  I use the saw 2-3 times a year for pruning, rogue bits of delivered firewood that don't fit, etc.  Never have trouble starting it.

My knowledge of chainsaws is minimal, but I assume that if you are cutting any hard wood that is the full length of the bar, you are asking a lot of the saw.  Especially the (basically) lowest model in the range of the quality brand.