This project is a very interesting case in the world of crypto. A platform for decentralized apps (dapps) it aims to reach where platforms like Ethereum cannot, at least at the time of writing.
One of the more important differences, when compared to ETH, is sidechains. Where all of Ethereum's chain contains all of the data for all smart contracts LSK creates a new sidechain for every Dapp that then “talks” to the main chain. This has a number of advantages. For one thing, it stops the need for hard forks when there is a problem in a Dapp, as it is not hosted in the main chain.
It also ensures the main chain will never be under stress, getting rid of slowed down data due to one or more dapps clogging it up. Something Ethereum had to deal with at least twice in 2017, first during the ICO explosion and then in the aftermath of the most famous Dapp of that year, Crypto Kitties (which at one point was responsible for nearly fifteen percent of the network transactions, clogging up the entire network).
Listed on some of the biggest exchanges in the world, while not as widely adopted as the other veteran coins, it is very easy to buy Lisk. A different matter is a storage.
There aren't anywhere near as many options for storing your LSK as with the top coins, with hardware wallet support for it not yet implemented as of the time of writing. Paper wallet alternatives exist and same with mobile and desktop.
An interesting alternative for LSK is the Nano Wallet. The attractive factor in the Nano (not to be confused with the Ledger Nano) is the possibility to earn tokens due to the Delegated Proof of Stake system, which in itself grants a whole article.
To make a long story short, the nano wallet allows investors to earn more LSK and there are a number of guides on how to do this all over the web. Definitely another plus mark.