Spiral cutter heads are the way to go. The older steel knives are a pain to change and get aligned again. With the spiral cutter heads it is a snap to change a single cutter or rotate all the cutters for a fresh edge. I would not buy a new jointer without a spiral/heliz type cutter head. For the price this looks good. My Delta x5 6" jointer has worked perfectly for 10= tears but if it ever disappears I will get a spiral/helix type. I could upgrade mine but the cost of the upgrade is more than this little jointer you are looking at.
One thing you need to be sure is to put a base on your jointer and clamp it down. You do not want a high speed spinning cutter shifting around in the shop and possible being pulled off your bench with it running. Portable tools work best when anchored. I once bought a Dremel brand scroll saw. I thought that was the worst machine in the world. Then I put a base on it and bolted it down and it was a pretty descent machine after all.