No direct experience but they are seen as a budget alternative to the 'big' names and with maybe not the same performance. Not sure if you are looking at buying new but check what you can get secondhand - some amazing steals on SIB's lately, real buyer's market. Like these below ended in the last week - a Zodiac or Quicksilver would be much more boat for less money and should hold it's value well:
Two examples of engine with 'free' SIB at this price:
