I just spent 2 weeks here. It was very peaceful and relaxing with only 9 rooms. The rooms were clean and spacious and reguarly cleaned. The kitchen was well equiped, although probably best for just preparing breakfast and lunch. The swimming pool was a nice size and made a nice change to the beach. Lassi's shops and restaurants were only 5 minutes walk down hill. Argostoli is a 30 minute walk or 5 Euro taxi ride away. The apartments are slightly uphill but nothing too strenuous. There's plenty of room to park hired cars too.
The beach is about 10 minutes walk away. Don't go down the nearest turning to Makris Gialos beach -walk further along the road away from lassi for 5 minutes and then head down through the woody bit and the the parasols are much cheaper! If you go to the nearest beach in the centre of lassi you will pay 10 Euros as opposed to 7.50 EU. Go into Argostoli to the produce market for you food unless you want to pay the over priced tourist rate for everything. The nicest nearest restaurant is the Olive Press- 5 minutes walk away-they do super taziki-it's seriously garlicy.
However, if you want to experience the real kefalonia avoid lassi of an evening-it's a souless superficial tourist made resort where there are no locals! By contrast Argostoli really comes to life in the evening with its trendy cafes and lots over fashion conscious Greeks it makes for fantastic people watching! Don't forget to try the ice coffee it's really tastey and all the locals drink it.

Plays really bad eurovision music. Less tacky than the other bars in lassi-although only tourists go here. Drinks are pricey.

Played live music and does extra garlicy taziki. Prawns and fish were very tastey.

The best thing about Lassi is its location. It has fab beaches and it's near to Argostoli. Apart from that it is a tacky touist resort and not remotely Greek. I didn't rate the restaurants either. The supermarkets are over priced and it lacks atmosphere. Neverthelss, it was a terribly convenient place to stay as far as getting around the island.
The best restaurants were the tiny family run ones found in small villages/towns around the island. The nicest beaches were the quiet ones where the locals went- dotted all along the coast and not charging 12 Euros to hire a parasol! The best atmosphere was in Argostoli with its trendy cafe culture - it was fun to come and watch the Greeks pose and the children play in the central square. Plus the shopping was not bad for such a small island!