the hotel was frankly Terrible. My room had bugs, cockroaches, mosquitoes both dead and alive on all 4 corners of the room and bed sheets. Under the bed had Condom and cigratte wrappers. Jessie and my children got bitten by dust mites. The water pressure was weak with either scalding hot or freezing cold water. Besides that, the toilet is dirty and not children friendly. To add to that the variety at breakfast was close to pathetic.

I prebooked a room at the Lanai Langkawi Beach Resort through Agoda as it was the best value for money I could find in the area. Indeed there are not a huge number of options on Pantai Tenggah, and if I had my time again I probably might have stayed on Pantai Cenang, or somewhere in between Pantai Tenggah and Pantai Cenang. I thought Cenang would be too busy and hectic for me, but really it wasn't as bustling as I expected, so it would've been OK. In contrast, there are hardly any shops in the Tenggah area, and having a car certainly came in handy when staying here. Finding the hotel was easy, as there were signs from the airport.
Anyway, the hotel grounds, rooms and swimming pools were clean. There is one main pool for the big kids, and a small shallow pool for the little kids! The bigger pool is not huge, but big enough that you can do some laps in it.
Checkin and cleaning staff were polite and pleasant, I had no qualms with them though I didn't have much to do with them either.
My room was a bit ancient, but I could live with this as it wasn't a 5 star resort I was expecting. Nevertheless I found there was no hot water in the shower, and I could hear the plumbing from the adjacent room. The noise was fixed by closing the bathroom sliding door, and I didn't complain about the lack of hot water as I wasn't there long and didn't have time to stuff around with them.
The airconditioner in the room was effective but noisy (rattling), so it prevented me from having a really decent nights' sleep.
Breakfast was a bit of an industrial affair, it was quite busy and felt a bit like a high school canteen. The variety was reasonable and as always you can find something that you like. Nothing special, but not bad and I didn't get sick.
The hotel is beachfront, which is nice, and there is a restaurant/bar attached to the hotel on the beach. The beach itself is nice, but not the prettiest I've ever seen, and there is a patrolled swimming area about 100m down from the hotel towards Pantai Cenang. The beach was a bit dirty, with some litter around which was a shame.
Overall this hotel was value for money, but I think they could do with some updating, or perhaps they should adjust their prices down a little. There are easy fixes to most of the problems, but I'm usually of the belief that problems should be nipped in the bud before they arise, so I shouldn't have to bring earplugs, and I shouldn't have to ask for hot water in the shower! The good points were the relaxed location and the pool. Most of the parasailing in the area seems to start and finish up the other end of Pantai Tenggah, at the end of Jalan Teluk Baru, so if you're up for it (and it was heaps of fun!), then go there and try to negotiate a better rate than the tour operators give you.
For duty free goods, go to Kuah Town, though many of the cigarette and alcohol prices are the same at the airport duty-free store. The duty free department store at the Langkawi Cineplex on Jalan Padang Matsirat has a good variety of clothing and alcohol. If you're on Langkawi, it's actually a pretty good idea to spend a couple of days exploring Kuah town. Make sure you also visit the cable-car as well as the 7 Wells a bit up the road from the Oriental Village/Cable Car complex. The 7 Wells was a tiring but worthwhile climb.
To conclude, if you're a budget-conscious traveller and want to stay in Pantai Tenggah, consider The Lanai but don't discount the other options.