Hello! What you're asking is rather vague... lol. So let me start off by saying a GREAT place to start understanding SF, what they offer, and what to expect is this
FAQ I've put together here on the forums. It's a virtual well of information.
SF's warranty is arguably the best on the market for their sabers. They are warrantied (with some exceptions..see the FAQ linked above) for full speed dueling and use. SF has the best blades on the market, hands down, when it comes to durability and strength. Again, see the FAQ for details on blade lengths.
The sabercore boards in the champion tiers are pretty basic, but offer some excellent customization options and settings, and highquality sound fonts.