According to forum posts, official airport taxis in Phnom Penh are available at a rate of US$12 to $15 depending on the destination within the city, offering reliability and no need for local language knowledge. Alternatively, tuk tuks can be hired just outside the airport for about US$6, providing a cheaper but less formal option.

Some travelers mentioned that public buses are an option, costing around KHR1,500, though this requires familiarity with the city and bus routes. Additionally, for those with mobile data, downloading the PassApp is recommended, as it facilitates pickups from outside arrivals, though there may be issues with drivers understanding maps.

Travelers have discussed an airport bus service that costs about $5 and runs two routes, potentially stopping near hotels, which is convenient if still operational. However, recent posts indicate that the K Star bus service might no longer be in operation as it has not been seen for months.

According to forum posts, many travelers recommend visiting the Tuol Sleng Genocide Museum and the Royal Palace to gain insight into Cambodia's rich yet poignant history. These locations are central to understanding the cultural and historical fabric of the city.

For those interested in shopping and experiencing local markets, some users have suggested visiting the Central Market and Russian Market. These markets are popular for their variety of goods ranging from souvenirs to local crafts.

Travelers have called out the possibility of taking day trips from Phnom Penh to nearby attractions. Options like Oudong, known for its historical sites, and the Phnom Tamao Wildlife Sanctuary, which offers a chance to see local wildlife, are highly recommended for short excursions.

Posts also highlight the importance of combining a visit to the Tuol Sleng Museum with a trip to the Killing Fields at Choeung Ek to fully appreciate the historical context of Cambodia. This combination offers a profound reflection on the country's past.

According to forum posts, the Phnom Penh Hotel is centrally located, making it a suitable base for tourists, though it may be somewhat dated and not in the most convenient location for reaching the riverside area. Travelers have called out the Palace Gate Hotel & Resort and Anik Palace Hotel as considerations, though no specific preference was given between the two.

Some travelers said that the Fancy Guesthouse on St 15 offers clean, comfortable rooms with A/C for US$15-20 and is in a quiet area, close to major attractions like the riverfront and Royal Palace. It has been noted that the Fancy Guesthouse also provides luggage storage facilities.

For many users, the Point Boutique Hotel on street 130 is highlighted as being very close to the riverfront and nightlife, with a popular sky bar and comfortable rooms priced at US$172 for 5 nights in a double deluxe room. However, the Frangipani Royal Palace has received mixed reviews; while one traveler appreciated its location and breakfast options, another criticized its general quality.

According to forum posts, currency exchange services are plentiful in Phnom Penh. Travelers have mentioned that many businesses, including jewelry shops and other types of stores, also offer currency exchange services, often indicated by displays of various currencies under glass.

Some travelers advised checking the current exchange rates on official sites like the National Bank of Cambodia for reference before making exchanges. It's recommended to compare rates at different exchange booths, as this can lead to more favorable exchange rates.

For exchanging damaged or old US dollar bills, posts indicate that ACLEDA Bank in Cambodia can replace torn bills without charging fees. Additionally, some money changers might exchange them but possibly at a slightly lower rate.

According to forum posts, food in Phnom Penh is noted for its freshness and variety. Some travelers have recommended visiting local markets early in the morning, such as Psar Leu in Siem Reap, to experience the freshest offerings.

Travelers have called out specific restaurants like Open Wine, Romdeng, and Friends for their good value and quality food. Additionally, some users suggest that the restaurant at the Palace Gate Hotel offers great food and service at acceptable prices.

For coffee enthusiasts, forum posts suggest exploring Cambodian coffee options. The Feel Good Cafe in Phnom Penh has been mentioned for selling locally grown coffee, providing visitors a taste of regional flavors.