I had been following LISK closely for a while and I think it is going to increase in value very soon.I am sharing my reasoning below and would love to hear your opinions/thoughts on the same.

Pros:

LISK has really started rolling out new updates to their wallet recently with lot of performance improvement and bug fixes. What I heard is, due to some restrictions on getting hold of the ICO funds last year, they were unable to do as much progress as they wanted. This year they are recruiting some new talents and is doing a 'meet the devs' live streaming programme with the community at the end of this month.
Everybody complained about the LISK logo when they came out and this time LISK is rebranding its platform with a professional design agency Taikonauten. You may remember what happened with PIVX after its rebranding.
LISK has set aside almost 10,000 BTC for future marketing/development and as a company they are very transparent in their financial reporting so far.LISK also have lots of byteballs worth millions, which they have promised to use for LISK's progress, once the byteball distribution is finished.
Active ambassadors in various countries organising meet-ups and workshops to raise awareness.The next one is scheduled in USA somewhere, I believe.
Once the refined SDK is out, LISK will open the doors of side chain applications to the millions of javascript developers out there.
Mobile wallets for both IOS and Android are already available for LISK through freewallet.org.(I hear apple dont allow many cryptocurrency related projects in their app store.)
Some graph observations from poloniex over last 2 weeks.
http://i68.tinypic.com/34p1kbs.png
You could see the big candles happening at regular intervals.To me this is some smart investors accumulating LISK at the current price.

With the development back on track, more than enough cash supply available for future growth and the accumulation pattern shown by whales in the recent past,LISK has got a lot of potential for growth from here.

Cons:

DPOS is great, but it has put strains in the community as people are constantly trying to get into the top 101 delegates. I hope to see the whole community working as one towards a common goal.
I haven't seen any proper aggressive marketing push by the LISK team yet, may be they are waiting for the sdk api to get out of the door first.
Lack of proper roadmap with tentative dates for completion - apparently something they are working on at the moment.
I heard a lot about LISK's association with Microsoft during the ICO time.I dont know how they were trying to achieve together I haven't seen any updates on that since the ICO is finished.
Unusable official website as it is constantly under DDOS attack.The website is the face of your coin to the open world and I would like to see proper measures put in place to mitigate these type of attacks and enhance user experience.

For me the pros outweigh the cons and LISK is looking great for a long term investment now.Learn more about LISK here

If you have LISK in your wallet, you could get more LISK by voting for delegates who actually share their earnings.Some useful links are

Pool List
Elite Group

Note: These are my personal opinions and please do your own research before investing any amount.